Algebrahard · Past Paper
If 3x + 4y = 10 and 4x + 3y = 11, what is the value of x + y?
A3
B21/7
C3
D7
✓ Correct Answer: A — 3
Adding the equations: 7x + 7y = 21. Dividing by 7 gives x + y = 3.
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✓ Correct Answer: A — 3
Adding the equations: 7x + 7y = 21. Dividing by 7 gives x + y = 3.
Share this question