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5*x-((2/7)*x)+1/4 = 9/14 // - 9/14
5*x-((2/7)*x)+1/4-(9/14) = 0
5*x+(-2/7)*x+1/4-9/14 = 0
33/7*x-11/28 = 0 // + 11/28
33/7*x = 11/28 // : 33/7
x = 11/28/33/7
x = 1/12
x = 1/12
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