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5*x-((4/4)*x)-7 = 13/11 // - 13/11
5*x-((4/4)*x)-(13/11)-7 = 0
5*x-x-13/11-7 = 0
4*x-90/11 = 0 // + 90/11
4*x = 90/11 // : 4
x = 90/11/4
x = 45/22
x = 45/22
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