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x in (-oo:+oo)
(-3/4)*(5*x-6) = -18 // + 18
(-3/4)*(5*x-6)+18 = 0
18-3/4*(5*x-6) = 0
18-3/4*(5*x-6) = 0
45/2-15/4*x = 0
45/2-15/4*x = 0
45/2-15/4*x = 0 // - 45/2
-15/4*x = -45/2 // : -15/4
x = -45/2/(-15/4)
x = 6
x = 6
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