22=-z/7+20

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Solution for 22=-z/7+20 equation: 


z in (-oo:+oo)

22 = 20-z/7 // - 20-z/7

22-(-z/7)-20 = 0

(1/7)*z-20+22 = 0

1/7*z+2 = 0 // - 2

1/7*z = -2 // : 1/7

z = -2/1/7

z = -14

z = -14

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