80=90-1/9x - solution

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Solution for 80=90-1/9x equation:

x in (-oo:+oo)

80 = 90-((1/9)*x) // - 90-((1/9)*x)

(1/9)*x-90+80 = 0

1/9*x-10 = 0 // + 10

1/9*x = 10 // : 1/9

x = 10/1/9

x = 90

x = 90

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