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(1/4)*(4*x-2)-(7/2) = 0
(1/4)*(4*x-2)-7/2 = 0
1/4*(4*x-2)-7/2 = 0
(1/4*2*(4*x-2))/2-7/2 = 0
1/4*2*(4*x-2)-7 = 0
2*x-8 = 0
(2*x-8)/2 = 0
(2*x-8)/2 = 0 // * 2
2*x-8 = 0
2*x-8 = 0 // + 8
2*x = 8 // : 2
x = 8/2
x = 4
x = 4
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