x and y could be a variety of things, you would need some thing like "y=4" or something similar.
With just "x+y=9", it could be:
0+9=9
1+8=9
2+7=9
3+6=9
4+5=9
5+4=9
6+3=9
7+2=9
8+1=9
9+0=9
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Can you help with this equation? Thanks. Solve for x and y and z for the following. x plus y plus z equals 9 x plus 2y plus 3z equals 23 x plus 5y plus -3z equals -7
(3,21)
x = 8, y = -1
Here x is equls to 9 and y is equal to 4
It is 9.