CPM Homework Help : INT1 Problem 3-127

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3-127.

Solve the equations below by first changing each equation to a simpler equivalent equation. Check your solutions.

$3000 x - 2000 = 10{,}000$

Hint (a):
Divide by a common factor, then solve.

$\frac { - 2 x } { 3 } - \frac { x } { 7 } = 17$

Hint (b):
Multiply by the Least Common Multiple of $3$ and $7$ .

$\frac { 5 } { 2 } x - \frac { 1 } { 3 } = 13$

Hint (c):
Multiply the equation by a common denominator.

$\frac { 3 } { 10 } + \frac { 2 x } { 5 } = \frac { 1 } { 2 }$

Hint (d):
See part (c) for help.
Answer (d):
$x = \frac{1}{2}$

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