-2=4+z/7

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Solution for -2=4+z/7 equation: 


z in (-oo:+oo)

-2 = z/7+4 // - z/7+4

-(z/7)-4-2 = 0

-1/7*z-6 = 0 // + 6

-1/7*z = 6 // : -1/7

z = 6/(-1/7)

z = -42

z = -42

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