Elephanttoothpaste Elephanttoothpaste
  • 19-06-2020
  • Mathematics
contestada

Five times one number minus two times a second number is 11. Three times the first number minus two times the second number is 1. what are the numbers?

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Pascalkings
Pascalkings Pascalkings
  • 21-06-2020

Answer:

first number is 5

second number is 7

Step-by-step explanation:

let x and y represent the first and second number

5x - 2y = 11 ........ equation 1

3x - 2y = 11.......... equation 2

so by elimination, equation 1 minus equation 2

5x - 3x - 2y - 2y = 11 - 1

2x = 10

x = 5

therefore the first number is 5

put x = 5 into equation 1

5x - 2y = 11

5(5) - 2y = 11

25 - 2y = 11

-2y = 11 - 25

-2y = - 14

y = 7

therefore the second number is 7

hope it helps .

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