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x in (-oo:+oo)
(3/4)*(x+4) = 3 // - 3
(3/4)*(x+4)-3 = 0
3/4*(x+4)-3 = 0
3/4*(x+4)-3 = 0
3/4*x = 0
(3*x)/4 = 0
(3*x)/4 = 0 // * 4
3*x = 0
3*x = 0 // : 3
x = 0
x = 0
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