which ordered pairs are solutions of each equation?(circle them)

Question

3x+3y=0

A.(1,-1)      B.(2,4)      C.(-1,1)      D.(-2,2)

Answer 1

For each pair, plug the first number in for x, and the second number in for y, and evaluate. If you get 0=0, then it is a solution. 

For example, trying choice A:

3(1) + 3 (-1) = 0 

3 - 3 = 0

0 = 0, so choice A is one solution. 

Following that example, try B, C, and D to see if any other pairs are solutions. (Hint: at least one more is)