CPM Homework Help : CC2 Problem 1-126

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1-126.

Find a value for $x$ that will make each of the following equations true.

Hint:

What undoes each operation?

$x+8=21$
Hint (a):
What plus $8$ is $21$ ? Or, what does $21−8$ equal?

$x-32=55$
Hint (b):
What minus $32$ is $55$ ? Or, what does $55+32$ equal?
Answer (b):
$x=87$

$3x=54$
Hint (c):
$3$ multiplied by what is $54$ ? Or, what does $54$ divided by $3$ equal?
Answer (c):
$18$

$\frac{x}{5}=10$
Hint (d):
What divided by $5$ is $10$ ? Or, what does $10$ multiplied by $5$ equal?

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