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112 = (100*x)/12 // - (100*x)/12
112-((100*x)/12) = 0
(-25/3)*x+112 = 0
112-25/3*x = 0 // - 112
-25/3*x = -112 // : -25/3
x = -112/(-25/3)
x = 336/25
x = 336/25
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