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x in (-oo:+oo)
140/100 = x/112 // - x/112
140/100-(x/112) = 0
7/5-1/112*x = 0 // - 7/5
-1/112*x = -7/5 // : -1/112
x = -7/5/(-1/112)
x = 784/5
x = 784/5
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