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x in (-oo:+oo)
(3/4)*(x+7) = x+150 // - x+150
(3/4)*(x+7)-x-150 = 0
3/4*(x+7)-x-150 = 0
3/4*(x+7)-x-150 = 0
21/4-1/4*x-150 = 0
-1/4*x-579/4 = 0
-1/4*x-579/4 = 0
-1/4*x-579/4 = 0 // + 579/4
-1/4*x = 579/4 // : -1/4
x = 579/4/(-1/4)
x = -579
x = -579
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