1. ) x + y = 10 - Go to Video
x - y = -20
2.) x - y = 18 - Go to Video
5x + y = 120
3.) 5x + 5y = 15 - Go to Video
-9x + 18y = -36
4.) x + y = 13 - Go to Video
x - 2y = -2
5.) 3x + 3y = 3 - Go to Video
5x + 7y = 15
6.) 4x - y = 8 Go to Video
12x + 5y = 24
7.) 3x - 2y = 8 Go to Video
6x + 5y = 52
8.) 3x + y = 6 Go to Video
6x - 8y = 12
9.) x + y = 9 Go to Video
x - y = -1
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