Standard Mathematics Primary 6 Algebra

Ahmad is x years old. His older brother Hakim is 3 years older than Ahmad. The sum of their ages is 27 years. Find Ahmad's age, in years.

A 12
B 13.5
C 15
D 24
Show Worked Solution

Worked Solution

Step 1: Express both ages in terms of x. Ahmad's age = x years. Hakim is 3 years older, so Hakim's age = (x + 3) years. Step 2: Form an equation from the total. Ahmad + Hakim = 27. x + (x + 3) = 27. Step 3: Simplify the left-hand side. 2x + 3 = 27. Step 4: Subtract 3 from both sides. 2x = 27 − 3 = 24. Step 5: Divide both sides by 2. x = 24 ÷ 2 = 12. Check (reverse): Ahmad = 12, Hakim = 12 + 3 = 15. Total = 12 + 15 = 27 ✓ Final answer: Ahmad is 12 years old. Answer: 12

Correct answer: 12

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