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Published byRalph Goodwin
Modified over 5 years ago
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 Worked Out Fill in the equation with the correct numbers. Cross Multiply Distributive Property Divide 92.07 by 12
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.
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.
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