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4*x+2*x-(1/5) = 299/5 // - 299/5
4*x+2*x-(1/5)-(299/5) = 0
4*x+2*x-1/5-299/5 = 0
6*x-60 = 0 // + 60
6*x = 60 // : 6
x = 60/6
x = 10
x = 10
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