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x in (-oo:+oo)
x/120 = 35/100 // - 35/100
x/120-(35/100) = 0
x/120-7/20 = 0
1/120*x-7/20 = 0 // + 7/20
1/120*x = 7/20 // : 1/120
x = 7/20/1/120
x = 42
x = 42
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