If x + y = 7 and y = 3, what is x?

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Multiple Choice

If x + y = 7 and y = 3, what is x?

Explanation:
Subtract y from both sides to solve for x: x = 7 − y. With y = 3, x = 7 − 3 = 4. Check by plugging back: 4 + 3 = 7, which matches the given sum. The value that satisfies both conditions is 4.

Subtract y from both sides to solve for x: x = 7 − y. With y = 3, x = 7 − 3 = 4. Check by plugging back: 4 + 3 = 7, which matches the given sum. The value that satisfies both conditions is 4.

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