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x in (-oo:+oo)
(5*(x-a))/2-(3*a) = 4 // - 4
(5*(x-a))/2-(3*a)-4 = 0
(5*(x-a))/2-3*a-4 = 0
(5*(x-a))/2+(-3*2*a)/2+(-4*2)/2 = 0
5*(x-a)-3*2*a-4*2 = 0
5*x-11*a-8 = 0
(5*x-11*a-8)/2 = 0
(5*x-11*a-8)/2 = 0 // * 2
5*x-11*a-8 = 0
5*x-11*a-8 = 0 // + -11*a-8
5*x = -(-11*a-8) // : 5
x = (-(-11*a-8))/5
x = (8-(-11*a))/5
x = (8-(-11*a))/5
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