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(1/4)*(8*x-12) = -10 // + 10
(1/4)*(8*x-12)+10 = 0
1/4*(8*x-12)+10 = 0
1/4*(8*x-12)+10 = 0
2*x+7 = 0
2*x+7 = 0
2*x+7 = 0 // - 7
2*x = -7 // : 2
x = -7/2
x = -7/2
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