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7 October, 19:10

Solve. - 2 (6 - 20n) = 20 (2n - 3)

a. 40

b. 36

c. no solution

d. all real numbers

+5
Answers (1)
  1. 7 October, 19:31
    0
    -2 (6-20n) = 20 (2n-3)

    -12 + 40n = 40n - 60

    40n = 40n - 60 + 12

    40n - 40n = 60 + 12 (dont minus 40n - 40n yet, we can factorise it)

    n (40-40) = 60 + 12

    n = (60 + 12) / (40-40)

    n = 60 + 12 / 0

    Therefore no solution as we cannot divide by 0
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