How to solve using cross multiplication Created by: Brittany and Andrea.

Slides:



Advertisements
Similar presentations
EXAMPLE 4 Solve proportions SOLUTION a x 16 = Multiply. Divide each side by 10. a x 16 = = 10 x5 16 = 10 x80 = x8 Write original proportion.
Advertisements

EXAMPLE 4 Solve proportions SOLUTION a x 16 = Multiply. Divide each side by 10. a x 16 = = 10 x5 16 = 10 x80 = x8 Write original proportion.
Solve an equation with variables on both sides
Write reasons for each step
EXAMPLE 2 Using the Cross Products Property = 40.8 m Write original proportion. Cross products property Multiply. 6.8m 6.8 = Divide.
Standardized Test Practice
To Start: 10 Points.
Standardized Test Practice
Standardized Test Practice
Solving Equations with Brackets or Fractions. Single Bracket Solve 3(x + 4) = 24 3x + 12 = 24 3x + 12 – 12 = x = 12 x = 4 Multiply brackets out.
Solve a radical equation
Solve the equation -3v = -21 Multiply or Divide? 1.
To identify basic multiplication facts and properties.
EXAMPLE 2 Rationalize denominators of fractions Simplify
Simplify a rational expression
Solving Equations Medina1 Variables on Both Sides.
Thursday, September 30 Today’s Agenda  Fill in planner  Practice 2-2  Bell Work  Collect test corrections and grade Practice 2-1  Solving Two.
Solve an equation by combining like terms EXAMPLE 1 8x – 3x – 10 = 20 Write original equation. 5x – 10 = 20 Combine like terms. 5x – =
Rational Equations Section 8-6.
Solving Equations Medina1 Multi-Step Equations. Steps to solve Medina2 3. Use inverse of addition or subtraction You may not have to do all the steps.
Practice 2.2 Solving Two Step Equations.
Use the substitution method
EXAMPLE 2 Solving an Equation Involving Decimals 1.4x – x = 0.21 Original equation. (1.4x – x)100 = (0.21)100 Multiply each side by 100.
Multiply one equation, then add
Multiplication and Division Properties. Multiplication Properties Commutative Property Associative Property Identity Property Zero Property Distributive.
2.2 Solving Two- Step Equations. Solving Two Steps Equations 1. Use the Addition or Subtraction Property of Equality to get the term with a variable on.
Multi Step Equations. Algebra Examples 3/8 – 1/4x = 1/2x – 3/4 3/8 – 1/4x = 1/2x – 3/4 8(3/8 – 1/4x) = 8(1/2x – 3/4) (Multiply both sides by 8) 8(3/8.
Solving 2 step equations. Two step equations have addition or subtraction and multiply or divide 3x + 1 = 10 3x + 1 = 10 4y + 2 = 10 4y + 2 = 10 2b +
Solving Equations with Variables on Both Sides. Review O Suppose you want to solve -4m m = -3 What would you do as your first step? Explain.
3.5 Solving Equations with Variables on Both Sides.
Substitution Method: Solve the linear system. Y = 3x + 2 Equation 1 x + 2y=11 Equation 2.
Rewrite a linear equation
EXAMPLE 2 Rationalize denominators of fractions Simplify
Solving Multi-Step Equations
Solving Two-Step Equations
ONE STEP EQUATIONS.
Multiplication Properties
ONE STEP EQUATIONS.
Multiplication Properties
Example 2 4 m 8 m 5m 12 m x y.
Solving Multi-Step Equations
Example 2 4 m 8 m 5m 12 m x y.
Lesson 2.1 How do you use properties of addition and multiplication?
Lesson 3.1 How do you solve one-step equations using subtraction, addition, division, and multiplication? Solve one-step equations by using inverse operations.
Solving Multi-Step Equations
Solve an equation by combining like terms
Multi-Step Equations Mrs. Book.
Solving Systems Check Point Quiz Corrections
EXAMPLE 4 Standardized Test Practice SOLUTION
Solving Multi-Step Equations
Solving one- and two-step equations
Solving Equations by Adding and Subtracting Solving Equations
Warm Up Solve for x. Simplify Simplify
Subtract the same value on each side
Solving Multi-Step Equations
Objective Solve equations in one variable that contain more than one operation.
Objective Solve equations in one variable that contain more than one operation.
Solving Multi-Step Equations
Ch. 1.3 Solving Linear Equations
Multiplication Properties
Learn to solve 2-step equations
Solving Two Step Algebraic Equations
Math-7 NOTES 1) 3x = 15 2) 4x = 16 Multiplication equations:
Solving Equations Using Multiplication and Division
Solving basic equations
ONE STEP EQUATIONS.
3(9z + 4) > 35z – 4 Original problem. Solve each inequality. Then graph the solution set on the number line. 3(9z + 4) > 35z – 4 Original problem.
By: Savana Bixler Solving Equations.
ONE STEP EQUATIONS.
EXAMPLE 4 Solve proportions Solve the proportion. ALGEBRA a x 16
Presentation transcript:

How to solve using cross multiplication Created by: Brittany and Andrea

Example 1. Steps: Write original equation Cross multiply Distributive property Subtract 9x from each side Subtract 15 from each side Divide each side by 3

Solve the equation by cross multiplying. You can do it!

Solve the equation by cross multiplying Rewrite the equation Cross Multiply Distributive Property Subtract 9x from 12x. Divide each side by 3.

Word Problem

Word Problem Worked Out Fill in the equation with the correct numbers. Cross Multiply Distributive Property Divide by 12