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m in (-oo:+oo)
3*m-((2/7)*m)+1 = 151/56 // - 151/56
3*m-((2/7)*m)-(151/56)+1 = 0
3*m+(-2/7)*m-151/56+1 = 0
19/7*m-95/56 = 0 // + 95/56
19/7*m = 95/56 // : 19/7
m = 95/56/19/7
m = 5/8
m = 5/8
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