What is x plus y plus 3 plus x-y-1?

Answer 1

2

Answer 2

The expression x + y + 3 + x - y - 1 can be simplified by combining like terms. We have 2 positive x's so we get 2x. We have one positive and one negative y which cancel to 0. Finally, 3 - 1 = 2. We arrive at the final 2x + 2.