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3-((2*x)/4)-((3*x)/10)-5 = 3-(x/5) // - 3-(x/5)
x/5-((2*x)/4)-((3*x)/10)-5-3+3 = 0
(-1/2)*x+(-3/10)*x+x/5-5-3+3 = 0
-3/5*x-5 = 0 // + 5
-3/5*x = 5 // : -3/5
x = 5/(-3/5)
x = -25/3
x = -25/3
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