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(2*w)/3 = 4-((1/2)*(x+6)) // - 4-((1/2)*(x+6))
(1/2)*(x+6)+(2*w)/3-4 = 0
1/2*(x+6)+(2*w)/3-4 = 0
(1/2*3*(x+6))/3+(2*w)/3+(-4*3)/3 = 0
1/2*3*(x+6)+2*w-4*3 = 0
2*w+3/2*x-12+9 = 0
2*w+3/2*x-3 = 0
(2*w+3/2*x-3)/3 = 0
(2*w+3/2*x-3)/3 = 0 // * 3
2*w+3/2*x-3 = 0
2*w+3/2*x-3 = 0 // - 2*w-3
3/2*x = -(2*w-3) // : 3/2
x = (-(2*w-3))/3/2
x = 2/3*(3-(2*w))
x = 2/3*(3-(2*w))
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