23.
S implify
e ach
a lgebraic
e xpression.
2
4
x
y
(
)
(a)
4x(x + 2)(1 − 3x)
( c)
x + 2
2
( d)
5(x + 9) − 2(4 − x)
(b)
−3
x
y
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24.
S olve
f or
t he
v ariable
4
x + 8 = 20
(b)
3(5x − 8) = −2(−x + 7) − 12x
− 60 = −11x
(a)
( c)
x
2
5
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1
1
4
1
(
)
− 8x = −12
4x − 8
= x − 4 + x
x −
− 2 =
x − 5
(d)
x
(e)
( f)
2
2
4
3
2
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__________________
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= 12
− 9 = 0
− 11x = 6
(g)
(h)
(i)
2x
2
2
2
x
x
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− 7x = 6
+ 12 = −19n
+ 4 = 8x
(j)
(k)
(l)
2
2
2
3x
5n
3x
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