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(4/7)*x-(3*x)+1/2 = -299/14 // + -299/14
(4/7)*x-(3*x)+1/2-(-299/14) = 0
(4/7)*x-3*x+1/2+299/14 = 0
153/7-17/7*x = 0 // - 153/7
-17/7*x = -153/7 // : -17/7
x = -153/7/(-17/7)
x = 9
x = 9
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