CPM Homework Help : AC Problem 7-39

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Home > AC > Chapter 7 > Lesson 7.1.4 > Problem 7-39

7-39.

Solve each of the following equations.

Note: Some steps may be done differently.
Be sure to check you answers by substituting them into the original equations.

$2x+8=3x-4$
Step 1(a):
Subtract $2x$ from both sides.
Check your work 1(a):
$8=x-4$
Step 2(a):
Add $4$ to both sides.
Check your work 2(a):
$12 = x$
Verify that $2\left(12\right)+8=3\left(12\right)-4$

$1.5\left(w + 2\right) = 3 + 2w$
Step 1(b):
Use the Distributive Property.
Check your work 1(b):
$1.5w + 3 = 3 + 2w$
Step 2(b):
Subtract $1.5x$ from both sides.
Step 3(b):
Subtract $3$ from both sides.
Step 4(b):
Divide both sides by $0.5$ .
Answer 2(b):
$w = 0$
Be sure to check your answer.
Now try parts (c) and (d) on your own.

$8(x+6)+23=7$

$3(2x-7)=5x+17+x$

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