Help simplifying with algebra!?

Question

I need to simplify:

(3x +3y) / 9 * (3(x-y)) / (4(x+y))

I need help with the answers that I keep getting, which are:

(9x-9y) / 36 ...or (9x^2-9y^2) / (36x +36y)

are either of those right?

Answer 1

(3x +3y) / 9 * (3(x-y)) / (4(x+y))

factor out the 3

3(x +y) / 9 * (3(x-y)) / (4(x+y))

simplify the left fraction

(x +y) / 3 * (3(x-y)) / (4(x+y))

simplify the 3s

(x +y)  * (x-y) / (4(x+y))

simplify the x+y

1  * (x-y) / (4

=(x-y) / 4

Answer 2

that looks great!