-3/7(y-28)-1/21y

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Solution for -3/7(y-28)-1/21y equation: 


y in (-oo:+oo)

(-3/7)*(y-28)-((1/21)*y) = 0

(-3/7)*(y-28)+(-1/21)*y = 0

-3/7*(y-28)-y/21 = 0

(-3/7*21*(y-28))/21-y/21 = 0

-3/7*21*(y-28)-y = 0

252-10*y = 0

(252-10*y)/21 = 0

(252-10*y)/21 = 0 // * 21

252-10*y = 0

252-10*y = 0 // - 252

-10*y = -252 // : -10

y = -252/(-10)

y = 126/5

y = 126/5

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