Drewww1 Drewww1
  • 12-01-2018
  • Mathematics
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The sum of two numbers is 90. Their difference is 18. Find the numbers.

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choixongdong
choixongdong choixongdong
  • 12-01-2018
let x and y are the 2 numbers
x + y = 90
x - y = 18
-----------add
2x = 108
  x = 54
x + y = 90
54 + y = 90
y = 36

answer 
the numbers are 54 and 36


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