Page 24 - Math Course 2 (Book 1)

Solving Algebraic Equations

Solve Equations by Adding Real World Example

Simplify x – 2 = –9. BUILDINGS
Write and solve an equation to f nd the expected
A. 7 height of the Freedom Tower, which is being built
B. –7 at the World Trade Center site in New York City.
C. –11
D. 11 The Sears Tower in Chicago, 1450 feet tall, is 326
feet lower than the expected height of the Free-
dom Tower.
Answer
A. 1450 = h + 326; 1124 feet
Multiple-Choice Test Item B. h = 1450 – 326; 1124 feet
C. 1450 = h – 326; 1776 feet
CONSTRUCTION D. 1450 – h = 326; 1776 feet
Board A measures 22 feet. That is 9 feet more
than the measure of board B. Which equation can Answer
be used to f nd the measure of board B?

A. B + 9 = 22
B. B – 9 = 22
C. 9 – B = 22
D. B = 22 + 9

Answer

Skill Practice!

Solve each equation. Check your solution.
1. r + 1 = – 5 2. h + 8 = 6 3. t – 3 = –11 4. p – 5 = 9

5. w + 9 = –9 6. x – 9 = –9 7. a + 7 = –7 8. m + 9 = –7

9. q – 4 = 5 10. b + 2 = 3 11. n – 11 = 1 12. r – 1 = –3

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