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(1/4)*(x-8)+7 = 0
1/4*(x-8)+7 = 0
1/4*(x-8)+7 = 0
1/4*x+5 = 0
1/4*x+5 = 0
1/4*x+5 = 0 // - 5
1/4*x = -5 // : 1/4
x = -5/1/4
x = -20
x = -20
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