situ2002 situ2002
  • 11-08-2021
  • Mathematics
contestada

If the ratio of x+y to x-y is 2/5, what's the ratio of y to x ?

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sqdancefan
sqdancefan sqdancefan
  • 18-08-2021

9514 1404 393

Answer:

  y/x = -3/7

Step-by-step explanation:

Write the given relationship and solve for y/x.

  (x +y)/(x -y) = 2/5

  5(x +y) = 2(x -y) . . . . . multiply by 5(x-y)

  5x +5y = 2x -2y . . . . . eliminate parentheses

  7y = -3x . . . . . . . . . . . add 2y-5x

  y/x = -3/7 . . . . . . . . divide by 7x

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