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x in (-oo:+oo)
27/100 = x/75 // - x/75
27/100-(x/75) = 0
27/100-1/75*x = 0 // - 27/100
-1/75*x = -27/100 // : -1/75
x = -27/100/(-1/75)
x = 81/4
x = 81/4
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