lesson 3-5 pages 120-124 solving two-step equations lesson check 3-4
TRANSCRIPT
Lesson 3-5 Pages 120-124
Solving Two-Step Equations
Lesson Check 3-4
What you will learn!
How to solve two-step equations.
Two-step equationTwo-step equation
What you really need to know!
A two-step equation contains two operations. To solve, use inverse operations to “undo” each operation in reverse order. First “undo” addition / subtraction. Then “undo” multiplication / division.
3x +0 = 213x = 21
Example 1: Solve
3x – 4 = 17+ 4 + 4
3 3 x = 7
05
5 n
Example 2: Solve
85
3 n
8 8
05
5 n
55
n5 5
n125n 25
Example 3:
The formula F = 1.8C + 32 can be used to convert Fahrenheit degrees to Celsius degrees. Solve the equation to find the equivalent Celsius temperature for 59°F.
Example 3:
59 = 1.8C + 32- 32 - 32
27 = 1.8C1.8 1.815 = C 15°C
Example 4:
x5 - =7-2 = x
Example 5:
b – 3b + 8 = 18
-2b + 8 = 18-2b = 10
b = -5
Page 122
Guided Practice
#’s 3-12
Pages 120-122 with someone at home and study
examples!
Read:
Homework: Pages 123-124
#’s 14-48 even
#’s 52-74
Lesson Check 3-5
Page
729
Lesson 3-5
Lesson Check 3-5