9x - 7y = 120.5
-36x + 28y = -482

(2) -2x - 8y = 22
-6x - y = 20

9x - 7y = 120.5
-36x + 28y = -482

The second equation can be simplified. Divide it by 4:

-9x + 7y = -120.5

Well... since both equations are the same, they meet from negative infinity to positive infinity.

-2x - 8y = 22
-6x - y = 20

Simplify the first equation by dividing it by 2:
-x - 4y = 11

Multiply the second equation by 4:
-24x - 4y = 80

Now, subtract one equation from the other. Can you do this?

Code:

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  -  x - 4y = 11
-  -24x - 4y = 80

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