Since there are many, 3, problems here, I will not explain very well. If there is only one problem then I can explain the solution better.Originally Posted bypianogurl1250

(2/3)(2c +5) = 8

Divide both sides by 2/3,

2c +5 = 8 /(2/3) = 8*(3/2) = 12

2c = 12 -5 = 7

c = 7/2 ---------answer.

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x/4 -15 = 10

x/4 = 10 +15 = 25

Multiply both sides by 4,

x = 25*4 = 100 -----------------answer.

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7(2x -5) = 28 +5x

14x -35 = 28 +5x

14x -5x = 28 +35

9x = 63

x = 63 /9 = 7 ----------answer,