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x in (-oo:+oo)
(-3/4)*(x-5) = -6 // + 6
(-3/4)*(x-5)+6 = 0
6-3/4*(x-5) = 0
6-3/4*(x-5) = 0
39/4-3/4*x = 0
39/4-3/4*x = 0
39/4-3/4*x = 0 // - 39/4
-3/4*x = -39/4 // : -3/4
x = -39/4/(-3/4)
x = 13
x = 13
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