InQuisitive Practice Test

If x + 2 = 7, what is x?

3 4 6 5

Correct Answer:

Explanation:

Solving this uses the idea of inverse operations to isolate the variable. You want to undo the +2 on the left side. Do that by subtracting 2 from both sides: x + 2 = 7 becomes x = 7 − 2, so x = 5. That value makes the left side become 5 + 2, which is 7, matching the right side. So the correct value is 5. If you test other numbers, they wouldn’t give 7 when you add 2, for example 3 would give 5, 4 would give 6, and 6 would give 8.

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