kingstacks67 kingstacks67
  • 21-10-2020
  • Mathematics
contestada

4. Two times a number added to another number is 25. Three times the first number minus the other number is 20. Find the two numbers.

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thewaterfountain88 thewaterfountain88
  • 21-10-2020

Answer:9 & 7

Step-by-step explanation:

Let x be the first number and y be the second.

 

2x + y = 25

3x - y =20

 

1) Add them together.

 

5x = 45

x = 9

 

2) Solve for y.

 

2(9) + y = 25

y=7

 

3) Check your work on the other equation.

 

3(9) - (7) = 20

27 - 7 =20

20 = 20

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