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5-23.

Solve each equation for the indicated variable.

$t=an+b\ (\text{for }b)$

Step (a):
Subtract ' $an$ ' from both sides.

$\frac{y}{3}-a=b\ (\text{for }y)$

Step 1(b):
Add ' $a$ ' to both sides.
Step 2(b):
Multiply both sides by $3$ .

$m=\frac{y}{x}\ (\text{for }y)$

Hint (c):
See Step 2 of part (b).

$m=\frac{y}{x}\ (\text{for }x)$

Hint (d):
Look at the answer you got for part (c).

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