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11 November, 22:09

What value of n makes the equation true?

0.7n+0.8n=2.1

n=3.60n=3.60

n=0.60n=0.60

n=1.40n=1.40

n=3.15

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Answers (1)
  1. 11 November, 22:36
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    0.7n + 0.8n = 2.1

    1.5n = 2.1 (add like terms (0.7+0.8=1.5))

    n=2.1/1.5 (get en on its own)

    n=1.40
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