Standard Mathematics Primary 6 Algebra

Given that a = 6 and b = 2, find the value of (5a − 4) ÷ 2 + 3b.

A 34
B 13
C 19
D 23
Show Worked Solution

Worked Solution

Step 1: Substitute a = 6 and b = 2 into the expression to get (5(6) − 4) ÷ 2 + 3(2). Step 2: Work the bracket first using BODMAS: 5(6) − 4 = 30 − 4 = 26. Step 3: Divide: 26 ÷ 2 = 13. Step 4: Add the last term: 13 + 3(2) = 13 + 6 = 19. Answer: 19

Correct answer: 19

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