Mr Tan's hawker stall starts the day with x kg of rice. He uses one-third of the rice during the morning rush, then receives a delivery of (2x − 5) kg. Which expression shows the total amount of rice, in kg, at the stall after the delivery?
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Worked Solution
Step 1: Find the rice remaining after the morning rush.
One-third used → two-thirds remain.
Remaining = x − x/3 = 3x/3 − x/3 = 2x/3
Step 2: Add the delivery.
Total = 2x/3 + (2x − 5)
Step 3: Convert 2x to thirds to combine like terms.
2x = 6x/3
Step 4: Combine.
2x/3 + 6x/3 − 5 = 8x/3 − 5
The total amount of rice is 8x/3 − 5 kg.
Correct answer: 8x/3 − 5
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