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(3/4)*(5*x+7) = 3*(3-(3*x))+9 // - 3*(3-(3*x))+9
(3/4)*(5*x+7)-(3*(3-(3*x)))-9 = 0
(3/4)*(5*x+7)-3*(3-3*x)-9 = 0
3/4*(5*x+7)-3*(3-3*x)-9 = 0
3/4*(5*x+7)-3*(3-3*x)-9 = 0
51/4*x-9-15/4 = 0
51/4*x-51/4 = 0
51/4*x-51/4 = 0
51/4*x-51/4 = 0 // + 51/4
51/4*x = 51/4 // : 51/4
x = 51/4/51/4
x = 1
x = 1
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