Question

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

Answer 1

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