In order to get a complete answer you need to know what x and y are equal to.
You need to have more information in order to answer this question. It seems that you may have left off part of the question. Equations are called that because they equate something to something else so there must be something on the other side. Normally, the other side would have a number (like 5 for example) or more terms(3+2y for example). The best I can give you here is 2x +2y. You have two unknowns here but you could solve each unknown in terms of the other if you had something on the other side and you could solve for the actual numerical values if you had two equations with either x, y, or both.
= 2x +2y =>(:2)=
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