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(1/2)*x-10 = 1/4 // - 1/4
(1/2)*x-(1/4)-10 = 0
(1/2)*x-1/4-10 = 0
1/2*x-41/4 = 0 // + 41/4
1/2*x = 41/4 // : 1/2
x = 41/4/1/2
x = 41/2
x = 41/2
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