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5-((3*x)/4) = 8*x // - 8*x
5-((3*x)/4)-(8*x) = 0
(-3/4)*x-8*x+5 = 0
5-35/4*x = 0 // - 5
-35/4*x = -5 // : -35/4
x = -5/(-35/4)
x = 4/7
x = 4/7
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