y-9=-1/7x

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Solution for y-9=-1/7x equation: 


x in (-oo:+oo)

y-9 = (-1/7)*x // - (-1/7)*x

y-((-1/7)*x)-9 = 0

(1/7)*x+y-9 = 0

1/7*x+y-9 = 0 // - y-9

1/7*x = -(y-9) // : 1/7

x = (-(y-9))/1/7

x = 7*(9-y)

x = 7*(9-y)

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