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m in (-oo:+oo)
2*m+3*m+4/7 = 179/7 // - 179/7
2*m+3*m+4/7-(179/7) = 0
2*m+3*m+4/7-179/7 = 0
5*m-25 = 0 // + 25
5*m = 25 // : 5
m = 25/5
m = 5
m = 5
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