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100-x-((1/2)*x)-((1/4)*x)-1 = 0
(-1/2)*x-x+(-1/4)*x-1+100 = 0
99-7/4*x = 0 // - 99
-7/4*x = -99 // : -7/4
x = -99/(-7/4)
x = 396/7
x = 396/7
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