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3/4x - 20 = 7
3x/4 - 20 = 7 Common denominator is 4.
4 (3x/4 - 20) = 4 x 7 Distribute the 4 though the parenthesis
4 x 3x/4 - 4 x 30 = 4 x 7
3x - 4 x 20 = 4 x 7
3x - 80 = 4 x 7
3x - 80 = 28 Add 80
3x = 28 + 80
3x = 108 Divide by 3
x = 108/3
x = 36
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