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m in (-oo:+oo)
(-3/7)*(m+5) = 2*m+3 // - 2*m+3
(-3/7)*(m+5)-(2*m)-3 = 0
(-3/7)*(m+5)-2*m-3 = 0
-3/7*(m+5)-2*m-3 = 0
-3/7*(m+5)-2*m-3 = 0
-17/7*m-3-15/7 = 0
-17/7*m-36/7 = 0
-17/7*m-36/7 = 0
-17/7*m-36/7 = 0 // + 36/7
-17/7*m = 36/7 // : -17/7
m = 36/7/(-17/7)
m = -36/17
m = -36/17
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