CHAPTER 1 Section 1.1 Solutions ----------------------------------------------------------------------------1.
5x = 35 1 1 ⋅ 5x = ⋅ 35 5 5
2.
4 = −5 + y 5 + 4 = 5 + −5 + y
5.
9=y
4p +5 = 9 4p = 4
5t + 11 = 18 5t = 7 t=7 5
n = 15
6.
−50 = −5t 1 1 − ⋅ ( −50) = − ⋅ ( −5t ) 5 5 10 = t
9.
3x − 5 = 7 3x = 12 x=4
18 = p
11.
p =1
13.
−3 + n = 12 3 + −3 + n = 3 + 12
1 6= p 3 1 3⋅6 = 3⋅ p 3
1 n=3 5 1 5 ⋅ n = 5 ⋅3 5 n = 15 10.
24 = −3x 1 1 − ⋅ 24 = − ⋅ ( −3x ) 3 3 −8 = x
8.
7.
3.
1 1 ⋅ 4t = ⋅ 32 4 4 t =8
x=7
4.
4t = 32
14.
9m − 7 = 11
12.
2x + 4 = 5
9m = 18
2x = 1
m=2
x =1 2
7x + 4 = 21 + 24x 7x = 17 + 24x −17 x = 17 x = −1
59
15.
3x − 5 = 25 + 6 x 3x = 30 + 6 x −3x = 30 x = −10