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OpenStudy (anonymous):
Use the graph to state the solution for the system. x – y = 4 (line a) x + y = 4 (line b) A. (0, –4) B. (4, 0) C. (0, 4) D. (–4, 0)
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iYuko (iyuko):
Sub in X and Y
OpenStudy (welshfella):
add the 2 equations and see what you get
OpenStudy (welshfella):
- the y's will disappear and you'l get an equation in x
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