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8-((1/4)*x) = (1/5)*x+6 // - (1/5)*x+6
8-((1/4)*x)-((1/5)*x)-6 = 0
(-1/4)*x+(-1/5)*x-6+8 = 0
2-9/20*x = 0 // - 2
-9/20*x = -2 // : -9/20
x = -2/(-9/20)
x = 40/9
x = 40/9
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