Page 30 - Math Course 2 (Book 1)
P. 30
Two-Step Equations
Real World Example
CELL PHONES Skill Practice!
Sue signed up for a cell phone plan that
charges $19 per month plus $0.10 per
minute used. Her f rst bill was $23.30.
Solve each equation. Check your solution.
Solve 19 + 0.10x = 23.30 to f nd how many minutes 1. 3x + 10 = 1
Sue used this month.
A. 0.43 minutes
B. 43 minutes
C. 53 minutes
D. 423 minutes
Answer
a
2. + 8 = 9
5
Equations with Negative Coef cients
Solve 9 = –4 – m.
A. 13
B. 5
C. –5
D. –13 3. 8w – 12 = –4
Answer
r
4. + 6 = 5
2
Combine Like Terms Before Solving
Solve 9 = 13 – x + 5x.
A. 1
2
B.
3 5. 18 – 2q = 4
2
C. –
3
D. –1
Answer
22
