You can put this solution on YOUR website! x+y=7
x-y=9
You must combine these equations into one equation by adding each side together:
x+y=7
x-y=9
_________
x+y+x-y = 16
Simplify:
2x=16
x=8
Now, you have a solution for one of the variables, x. Substitute this value for x into either of the original equations to solve for y.
8+y=7
y=-1
Now, you have the solution x=8m y=-1. Substitute these values in to the original equations to confirm that they solve them both. They do.
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