CPM Homework Help : CCAA Problem 7-63

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Home > CCAA > Chapter 7 Unit 9 > Lesson CC3: 7.2.3 > Problem 7-63

7-63.

For each equation below, solve for $x$ and check your answer.

$10(0.02x−0.01)=1$
Step 1 (a):
Distribute and multiply by $10$ .
$20x−10=100$
Step 2 (a):
Add $10$ to both sides.
$20x=110$
Step 3 (a):
Divide both sides by $20$ .
Answer (a):
$x=5.5$

$\frac{1}{3}x-6=8$
Hint (b):
Multiply by a common denominator to remove fractions. Refer to part (a) for more help.

$\frac { x } { 3 } + 1 = \frac { x } { 4 } - 1$
Hint (c):
Refer to part (b).

$0.9x−2.1+0.9=0.2(5−x)$
Hint (d):
Refer to part (a).
Answer (d):
$x=2$

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