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(1/4)*(4*x-8) = 20 // - 20
(1/4)*(4*x-8)-20 = 0
1/4*(4*x-8)-20 = 0
1/4*(4*x-8)-20 = 0
x-22 = 0
x-22 = 0
x-22 = 0 // + 22
x = 22
x = 22
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