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x in (-oo:+oo)
x*((6*y)/5) = 7 // - 7
x*((6*y)/5)-7 = 0
6/5*x*y-7 = 0 // + 7
6/5*x*y = 7 // : 6/5*y
x = 7/(6/5*y)
x = 35/6*y^-1
x = 35/6*y^-1
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