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(4*x+20)/2-((3*x+6)/4) = -1 // + 1
(4*x+20)/2-((3*x+6)/4)+1 = 0
(4*x+20)/2+(-1*(3*x+6))/4+1 = 0
(4*(4*x+20))/(2*4)+(-1*2*(3*x+6))/(2*4)+(1*2*4)/(2*4) = 0
4*(4*x+20)-1*2*(3*x+6)+1*2*4 = 0
10*x+8+68 = 0
10*x+76 = 0
(10*x+76)/(2*4) = 0
(10*x+76)/(2*4) = 0 // * 2*4
10*x+76 = 0
10*x+76 = 0 // - 76
10*x = -76 // : 10
x = -76/10
x = -38/5
x = -38/5
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