CPM Homework Help : CCA Problem 4-76

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4-76.

Solve each equation for the indicated variable.

$y = m x + b\quad (\text{for } b )$
Hint (a):
Isolate $b$ on one side by moving $mx$ to the other.

$y = m x + b \quad ( \text { for } x )$
Hint (b):
Isolate $x$ on one side by moving $b$ and then dividing by $m$ .

$I = p r t \quad ( \text { for } t )$
Hint (c):
Refer to parts (a) and (b) for help.

$A = p + p r t \quad ( \text { for } t )$
Hint (d):
Refer to parts (a) and (b) for help.
Answer (d):
$\frac{A-p}{pr}$

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