CPM Homework Help : MC2 Problem 8-8

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Home > MC2 > Chapter 8 > Lesson 8.1.1 > Problem 8-8

8-8.

Solve each equation.

$3(x + 4) =-42$
Hint (a):
Distribute.
$3(x) + 3(4) =-42$
More Help 1(a):
Simplify.
$3x + 12 =-42$
More Help 2(a):
Subtract $12$ from each side.
$3x + 12 =-42$
$−12 −12$
$3x = −54$
Answer (a):
$x =-18$

$90 = 5-(2x + 1)$
Hint (b):
Distribute.
$90 = 5-2x-1$
More Help 1(b):
Simplify.
$90 = 4-2x$
More Help 2(b):
Subtract 4 from each side.
$90 = 4-2x$
$−4 −4$
$86 = −2x$
Answer (b):
$x =-43$

$5(3 + x) = 3x$
Hint (c):
Follow the methods presented in part (a) and part (b).

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