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m in (-oo:+oo)
2*(7*m+4) = 148 // - 148
2*(7*m+4)-148 = 0
2*(7*m+4)-148 = 0
14*m-140 = 0
14*m-140 = 0
14*m-140 = 0 // + 140
14*m = 140 // : 14
m = 140/14
m = 10
m = 10
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