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x in (-oo:+oo)
(3*x)/4+7 = 3*x+1 // - 3*x+1
(3*x)/4-(3*x)-1+7 = 0
(3*x)/4-3*x-1+7 = 0
6-9/4*x = 0 // - 6
-9/4*x = -6 // : -9/4
x = -6/(-9/4)
x = 8/3
x = 8/3
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