rainbow_rocks03
  • rainbow_rocks03
Which number can replace the variable to make these fractions equivalent? n/7 = 54/42 A. 4 B. 6 C. 8 D. 9
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
multiply both sides by 7
rainbow_rocks03
  • rainbow_rocks03
so 7*7=49
anonymous
  • anonymous
what is n/7 x 7

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rainbow_rocks03
  • rainbow_rocks03
n/49
anonymous
  • anonymous
nope
anonymous
  • anonymous
ignore the n. 1/7 x 7
rainbow_rocks03
  • rainbow_rocks03
1
anonymous
  • anonymous
correct, now put the n back
anonymous
  • anonymous
1 x n?
rainbow_rocks03
  • rainbow_rocks03
7 ?
anonymous
  • anonymous
huh? 1 x n is just n
anonymous
  • anonymous
The whole point of this is just to find what n equals
rainbow_rocks03
  • rainbow_rocks03
oh yeah I forgot that
anonymous
  • anonymous
now what we do to one side of the equation we do to the other
rainbow_rocks03
  • rainbow_rocks03
multiply?
anonymous
  • anonymous
so we have n = (54/42) x 7
anonymous
  • anonymous
what does n equal?
rainbow_rocks03
  • rainbow_rocks03
9 and 9=D
anonymous
  • anonymous
correct
rainbow_rocks03
  • rainbow_rocks03
thx
anonymous
  • anonymous
np

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