Fundamentals of Mathematics, 2008a

676 CHAPTER 11. ALGEBRAIC EXPRESSIONS AND EQUATIONS
Exercise 11.9.43 (Solution on p. 690.)
− (a − b), if a = 0 and b = −6
Exercise 11.9.44
− (x − x − y), if x = 4 and y = −4
Exercise 11.9.45 (Solution on p. 690.)
(y + 2) 2 − 6 (y + 2) − 6, if y = 2
Exercise 11.9.46
(a − 7) 2 − 2 (a − 7) − 2, if a = 7
11.9.1.2 Combining Like Terms Using Addition and Subtraction (Section 11.3)
For problems 47-56, simplify each expression by combining like terms.
Exercise 11.9.47 (Solution on p. 690.)
4a + 5 − 2a + 1
Exercise 11.9.48
7x + 3x − 14x
Exercise 11.9.49 (Solution on p. 690.)
−7b + 4m − 3 + 3n
Exercise 11.9.50
−9k − 8h − k + 6h
Exercise 11.9.51 (Solution on p. 690.)
−x + 5y − 8x − 6x + 7y
Exercise 11.9.52
6n − 2n + 6 − 2 − n
Exercise 11.9.53 (Solution on p. 690.)
0m + 3k − 5s + 2m − s
Exercise 11.9.54
| −8 | a+ | 2 | b− | −4 | a
Exercise 11.9.55 (Solution on p. 690.)
| 6 | h− | −7 | k+ | −12 | h+ | 4 | · | −5 | h
Exercise 11.9.56
| 0 | a − 0a + 0
11.9.1.3 Equations of the Form ax = b and x a
= b, Translating Words to Mathematical Symbols
, and Solving Problems (Section 11.5,Section 11.6,Section 11.7)
For problems 57-140, solve each equation.
Exercise 11.9.57 (Solution on p. 690.)
x + 1 = 5
Exercise 11.9.58
y − 3 = −7
Exercise 11.9.59 (Solution on p. 690.)
x + 12 = 10
Exercise 11.9.60
x − 4 = −6
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