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(15/4)*x-2 = (7/2)*x-13 // - (7/2)*x-13
(15/4)*x-((7/2)*x)-2+13 = 0
(15/4)*x+(-7/2)*x-2+13 = 0
1/4*x+11 = 0 // - 11
1/4*x = -11 // : 1/4
x = -11/1/4
x = -44
x = -44
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