Combine like terms: 2a + 7a − 3a.

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Multiple Choice

Combine like terms: 2a + 7a − 3a.

Explanation:
Combining like terms means adding the coefficients of terms that share the same variable. All three terms have the same variable a, so you can add their coefficients: 2 + 7 − 3 equals 6. Therefore, 2a + 7a − 3a simplifies to 6a. This matches the idea that you’re counting how many a’s you have in total. If you forget to subtract the last term, you’d get 9a; if you drop a term or misread a sign, you’d get 2a or 4a.

Combining like terms means adding the coefficients of terms that share the same variable. All three terms have the same variable a, so you can add their coefficients: 2 + 7 − 3 equals 6. Therefore, 2a + 7a − 3a simplifies to 6a. This matches the idea that you’re counting how many a’s you have in total. If you forget to subtract the last term, you’d get 9a; if you drop a term or misread a sign, you’d get 2a or 4a.

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