(21-z)/3=-11

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Solution for (21-z)/3=-11 equation: 


z in (-oo:+oo)

(21-z)/3 = -11 // + 11

(21-z)/3+11 = 0

(21-z)/3+(3*11)/3 = 0

3*11-z+21 = 0

54-z = 0

(54-z)/3 = 0

(54-z)/3 = 0 // * 3

54-z = 0

54-z = 0 // - 54

-z = -54 // * -1

z = 54

z = 54

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