7=z/3

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Solution for 7=z/3 equation: 


z in (-oo:+oo)

7 = z/3 // - z/3

7-(z/3) = 0

7-1/3*z = 0 // - 7

-1/3*z = -7 // : -1/3

z = -7/(-1/3)

z = 21

z = 21

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