Solve the simultaneous equations and .
Answer and explanation
Correct answer: A. ,
- Step 1: Add the two equations to eliminate : , so .
- Step 2: Substitute into : , so .
- Step 3: Check in : .
Answer
, .
Why not the others: , : Check: works, but , not . , : Check: works, but , not . , : Check: , not .
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