Micro9 Micro9
  • 23-11-2018
  • Mathematics
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X:y=5:3 and x+y=56 work out the value of x-y

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jimrgrant1 jimrgrant1
  • 23-11-2018

x - y = 14

given the ratio x : y = 5 : 3

then let x = 5x and y = 3x, hence equation can be expressed as

5x + 3x = 56

8x = 56 ( divide both sides by 8 )

x = 7

Hence x = 5 × 7 = 35 and y = 3 × 7 = 21

Thus x - y = 35 - 21 = 14


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