20-22=z/-4

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Solution for 20-22=z/-4 equation: 


z in (-oo:+oo)

20-22 = z/(-4) // - z/(-4)

20-(z/(-4))-22 = 0

1/4*z-2 = 0 // + 2

1/4*z = 2 // : 1/4

z = 2/1/4

z = 8

z = 8

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