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20 December, 18:40

A young boy is growing at a rate of 3.5 cm per month. He is currently 90 cm tall. At that rate, in how many months will the boy grow to a height of 132 cm?

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Answers (2)
  1. 20 December, 18:50
    0
    3.5x+90=132

    -90 - 90

    3.5x=42

    x=12
  2. 20 December, 18:56
    0
    Heightnow+heightgrown=132

    heightgrown=3.5 times months (m)

    heightnow=90

    90+3.5m=132

    minus 90 both sides

    3.5m=42

    divide both sides by 3.5

    m=12

    12 months
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