1/7(y-9)=(1/3)y

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Solution for 1/7(y-9)=(1/3)y equation: 


y in (-oo:+oo)

(1/7)*(y-9) = (1/3)*y // - (1/3)*y

(1/7)*(y-9)-((1/3)*y) = 0

(1/7)*(y-9)+(-1/3)*y = 0

1/7*(y-9)-y/3 = 0

(1/7*3*(y-9))/3-y/3 = 0

1/7*3*(y-9)-y = 0

-4/7*y-27/7 = 0

(-4/7*y-27/7)/3 = 0

(-4/7*y-27/7)/3 = 0 // * 3

-4/7*y-27/7 = 0

-4/7*y-27/7 = 0 // + 27/7

-4/7*y = 27/7 // : -4/7

y = 27/7/(-4/7)

y = -27/4

y = -27/4

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