# 2.1 Solving One Step Equations

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2.1 Solving One Step Equations
Objective: Solve equations using addition and subtraction. Discuss: 2 = 2. What if I add 3 to both sides?

2.1 Solving One Step Equations
Remember: Adding or subtracting ANY number to BOTH Sides does not change the equation. Remember: ADDING undoes SUBTRACTION Remember: SUBTRACTING undoes ADDITION

2.1 Solving One Step Equations
SIMPLIFY: Combine like terms and/or distribute on the left and right if NEEDED. SORT: variables on one side, numbers on the other SOLVE: isolate the variable, must be a single POSITIVE variable.

2.1 Solving One Step Equations
GOAL: ISOLATE the variable. That means get it by itself on one side with numbers and/or other variables on the other side. To do this, follow the GOLDEN RULE of Equation Solving Whatever I do unto one side of the equals sign; do unto the other.

Practice with Examples
Example 1: Solve x + 13 = 27 Always Check The Solution with Substitution!

Practice with Examples
Example 2: Solve - 7 = b - 37 Always Check The Solution with Substitution!

Practice with Examples
Example 3: Solve 4x= 6.4 Always Check The Solution with Substitution!

Practice with Examples

Practice with Examples

Practice with Examples
Example 6: p. 84 in book Always Check The Solution with Substitution!

Section 2.1 Homework Homework P – 48 even.