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2*(3*x+7) = 1/4 // - 1/4
2*(3*x+7)-(1/4) = 0
2*(3*x+7)-1/4 = 0
(2*4*(3*x+7))/4-1/4 = 0
2*4*(3*x+7)-1 = 0
24*x+55 = 0
(24*x+55)/4 = 0
(24*x+55)/4 = 0 // * 4
24*x+55 = 0
24*x+55 = 0 // - 55
24*x = -55 // : 24
x = -55/24
x = -55/24
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