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(1/4)*x-((3/5)*x)+5 = 268/55 // - 268/55
(1/4)*x-((3/5)*x)-(268/55)+5 = 0
(1/4)*x+(-3/5)*x-268/55+5 = 0
7/55-7/20*x = 0 // - 7/55
-7/20*x = -7/55 // : -7/20
x = -7/55/(-7/20)
x = 4/11
x = 4/11
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