Question

Simplify the expression below:

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


please show your work and i'll give brainliest :,)

Answer 1

(-5/7)*(y-28)-((1/21)*y) = 0

(-5/7)*(y-28)+(-1/21)*y = 0

-5/7*(y-28)-y/21 = 0

(-5/7*21*(y-28))/21-y/21 = 0

-5/7*21*(y-28)-y = 0

420-16*y = 0

(420-16*y)/21 = 0

(420-16*y)/21 = 0 // * 21

420-16*y = 0

420-16*y = 0 // - 420

-16*y = -420 // : -16

y = -420/(-16)

y = 105/4