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(2/3)*(2*x+2) = 3*(3-(4*x))+9 // - 3*(3-(4*x))+9
(2/3)*(2*x+2)-(3*(3-(4*x)))-9 = 0
(2/3)*(2*x+2)-3*(3-4*x)-9 = 0
2/3*(2*x+2)-3*(3-4*x)-9 = 0
2/3*(2*x+2)-3*(3-4*x)-9 = 0
40/3*x-9-23/3 = 0
40/3*x-50/3 = 0
40/3*x-50/3 = 0
40/3*x-50/3 = 0 // + 50/3
40/3*x = 50/3 // : 40/3
x = 50/3/40/3
x = 5/4
x = 5/4
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