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a in (-oo:+oo)
a/124 = 75/100 // - 75/100
a/124-(75/100) = 0
a/124-3/4 = 0
1/124*a-3/4 = 0 // + 3/4
1/124*a = 3/4 // : 1/124
a = 3/4/1/124
a = 93
a = 93
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