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x in (-oo:+oo)
X-((3/4)*(2*x-12)) = (7*x)/2+5 // - (7*x)/2+5
X-((3/4)*(2*x-12))-((7*x)/2)-5 = 0
(-3/4)*(2*x-12)+X+(-7/2)*x-5 = 0
X-3/4*(2*x-12)+(-7*x)/2-5 = 0
(-3/4*2*(2*x-12))/2+(2*X)/2+(-7*x)/2+(-5*2)/2 = 0
2*X-3/4*2*(2*x-12)-7*x-5*2 = 0
2*X-3*x-7*x-10+18 = 0
2*X-10*x-10+18 = 0
2*X-10*x+8 = 0
(2*X-10*x+8)/2 = 0
(2*X-10*x+8)/2 = 0 // * 2
2*X-10*x+8 = 0
2*X-10*x+8 = 0 // - 2*X+8
-10*x = -(2*X+8) // : -10
x = (-(2*X+8))/(-10)
x = (2*X+8)/10
x = (2*X+8)/10
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