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white (in the end) → 1u red (in the end) → 3u
total → 1 + 3 = 4u
2u → 220 + 58 = 278 4u → 278 x 2 = 556
Question 12b
Video explanation ↓There were 162 more white buttons than red buttons at first. Mr Quek used 220 white buttons.Mrs Quek then bought another 220 red buttons. After this, there were 3 times as many red buttons as white buttons. What was the total number of buttons in the end? (3 marks)
Answer: 556 buttons