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(1/4)*(5*x-7) = 3 // - 3
(1/4)*(5*x-7)-3 = 0
1/4*(5*x-7)-3 = 0
1/4*(5*x-7)-3 = 0
5/4*x-19/4 = 0
5/4*x-19/4 = 0
5/4*x-19/4 = 0 // + 19/4
5/4*x = 19/4 // : 5/4
x = 19/4/5/4
x = 19/5
x = 19/5
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