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x in (-oo:+oo)
2*x+x+4/6 = 7 // - 7
2*x+x+4/6-7 = 0
3*x-19/3 = 0 // + 19/3
3*x = 19/3 // : 3
x = 19/3/3
x = 19/9
x = 19/9
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