-7m-4+4m=-31

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Solution for -7m-4+4m=-31 equation: 


m in (-oo:+oo)

4*m-7*m-4 = -31 // + 31

4*m-7*m-4+31 = 0

27-3*m = 0 // - 27

-3*m = -27 // : -3

m = -27/(-3)

m = 9

m = 9

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