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(1/4)*x+7 = 257/36 // - 257/36
(1/4)*x-(257/36)+7 = 0
(1/4)*x-257/36+7 = 0
1/4*x-5/36 = 0 // + 5/36
1/4*x = 5/36 // : 1/4
x = 5/36/1/4
x = 5/9
x = 5/9
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