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3.5*(0.5*x-4) = (3/2)*x-1.2 // - (3/2)*x-1.2
3.5*(0.5*x-4)-((3/2)*x)+1.2 = 0
3.5*(0.5*x-4)+(-3/2)*x+1.2 = 0
3.5*(0.5*x-4)+(-3*x)/2+1.2 = 0
(2*3.5*(0.5*x-4))/2+(-3*x)/2+(1.2*2)/2 = 0
2*3.5*(0.5*x-4)-3*x+1.2*2 = 0
0.5*x-28+2.4 = 0
0.5*x-25.6 = 0
(0.5*x-25.6)/2 = 0
(0.5*x-25.6)/2 = 0 // * 2
0.5*x-25.6 = 0
0.5*x-25.6 = 0 // + 25.6
0.5*x = 25.6 // : 0.5
x = 25.6/0.5
x = 51.2
x = 51.2
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