Primary 6 Mathematics — Algebra Practice | Standard

Standard Mathematics Primary 6 Algebra

Simplify 3a + 4 + 2(a − 5) − 7.

A 5a − 13

B 5a − 3

C 5a + 1

D 7a − 13

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Worked Solution

Step 1: Expand the bracket. 2(a − 5) = 2a − 10. Step 2: Rewrite the full expression. 3a + 4 + 2a − 10 − 7. Step 3: Collect like terms (a-terms). 3a + 2a = 5a. Step 4: Collect constant terms. 4 − 10 − 7 = −13. Answer: 5a − 13. Answer: 5a − 13

Correct answer: 5a − 13

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