-1=z/3-7 - solution

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Solution for -1=z/3-7 equation:

z in (-oo:+oo)

-1 = z/3-7 // - z/3-7

7-(z/3)-1 = 0

6-1/3*z = 0 // - 6

-1/3*z = -6 // : -1/3

z = -6/(-1/3)

z = 18

z = 18

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