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(5/2)*(2*x-6)-((1/3)*(12*x-18)) = 7 // - 7
(5/2)*(2*x-6)-((1/3)*(12*x-18))-7 = 0
(5/2)*(2*x-6)+(-1/3)*(12*x-18)-7 = 0
5/2*(2*x-6)-1/3*(12*x-18)-7 = 0
5/2*(2*x-6)-1/3*(12*x-18)-7 = 0
x-9-7 = 0
x-16 = 0
x-16 = 0
x-16 = 0 // + 16
x = 16
x = 16
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