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Question
Solve the following simultaneous equations graphically.
x + y = 0 ; 2x – y = 9
Graph
Sum
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Solution
x = 3
3 + y = 0
y = –3
x + y = 0
| x | 0 | 1 | –1 |
| y | 0 | –1 | 1 |
2x – y = 9
| x | 0 | 5 | 4 |
| y | –9 | 1 | –1 |
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