Lesson 7-1 Pages 330-333 Solving Equations with Variables on Each Side.

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Presentation transcript:

Lesson 7-1 Pages Solving Equations with Variables on Each Side

What you will learn! How to solve equations with variables on each side.

What you really need to know! To solve equations with variables on each side, use the Addition or Subtraction Property of Equality to write an equivalent equation with the variable on one side. Then solve the equation.

Link to Pre-Made Lesson

Example 1: Solve:5x+12= 2x 2x -5x-5x 12=-3x =x

5x+12= -2x-2x 3x+12= x= x=-4

Example 2: Solve:7x+3=2x+23 -2x-2x 5x+3= x=20 55 x=4

Example 2b: Solve:1.7+a=2.5a−4.9 -a-a 1.7=1.5a− =1.5a =a

Example 3: A car rental agency has two plans. Under plan A, a car rents for $80 plus $20 each day. Under plan B, a car rents for $120 plus $15 each day. What number of days results in the same costs? d = d

Example 2b: Solve:80+20d=120+15d -15d-15d 80+5d= d=40 55 d=8 Same for 8 days

Page 332 Guided Practice #’s 3-9

Pages with someone at home and study examples! Read:

Homework: Pages #’s even #’s 39-40, PA Lesson Check 7-1

Page 739 Lesson 7-1

PA Lesson Check 7-1