CPM Homework Help : CC2MN Problem 7-87

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Home > CC2MN > Chapter 7 > Lesson 7.2.3 > Problem 7-87

7-87.

Solve each equation. Record your work and check your solution.

$5(x-2)+(-9)=-7(1-x)$
Step 1 (a):
Distribute the $5$ and $-7$ , respectively. Remember that the $7$ is negative so the signs inside the parentheses need to change.
$5x-10+(-9)=-7+7x$
Step 2 (a):
Isolate $x$ on one side of the equation.
$-12=2x$
Step 3 (a):
Solve for $x$ using division.
Answer (a):
$x=-6$

$-6x-7=-1(-9+2x)$
Hint (b):
Follow the steps outlined in part (a). Start by distributing $-1$ on the right side of the equation.

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