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m in (-oo:+oo)
3*m+4 = 70-3*m // - 70-3*m
3*m-(-3*m)-70+4 = 0
3*m+3*m-70+4 = 0
6*m-66 = 0 // + 66
6*m = 66 // : 6
m = 66/6
m = 11
m = 11
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