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5*x+3/8 = 667/72-5*x // - 667/72-5*x
5*x-(-5*x)+3/8-(667/72) = 0
5*x+5*x+3/8-667/72 = 0
10*x-80/9 = 0 // + 80/9
10*x = 80/9 // : 10
x = 80/9/10
x = 8/9
x = 8/9
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