Todd B. answered 12/03/12
Tutor
3.8
(5)
A Clear Approach to Mathematics Education
Dariauna,
Simply expand out the 2(x-y) term in your problem which gives you 2x - 2y and then add 3x ...
2(x-y) + 3x = 2x - 2y + 3x = 5x - 2y
where 5x - 2y is your expression in its simplest form.