If x + y = 10, x - y = 10, then x = _____?
- 10
- 12
- 11
- None of these
Explanation
Step 1: Add the two equations to eliminate y
(x + y) + (x - y) = 10 + 10
2x = 202x = 10
Step 2: Solve for x
x = 20/2x = 10
Related MCQs
- 8
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- 11
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