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(1/2)*(2*x-7)+1/2 = -2*x // + -2*x
(1/2)*(2*x-7)-(-2*x)+1/2 = 0
(1/2)*(2*x-7)+2*x+1/2 = 0
1/2*(2*x-7)+2*x+1/2 = 0
(1/2*2*(2*x-7))/2+(2*2*x)/2+1/2 = 0
1/2*2*(2*x-7)+2*2*x+1 = 0
6*x-7+1 = 0
6*x-6 = 0
(6*x-6)/2 = 0
(6*x-6)/2 = 0 // * 2
6*x-6 = 0
6*x-6 = 0 // + 6
6*x = 6 // : 6
x = 6/6
x = 1
x = 1
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