3=m/2-7

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Solution for 3=m/2-7 equation: 


m in (-oo:+oo)

3 = m/2-7 // - m/2-7

3-(m/2)+7 = 0

10-1/2*m = 0 // - 10

-1/2*m = -10 // : -1/2

m = -10/(-1/2)

m = 20

m = 20

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