Thank you...I forgot to add the other part of the question..

The sum of two number equal 25
The second number is 4 times larger than the first number.
Write the two equations AND what are the two numbers.

I have x+4x =25
but not sure what the two equations would be? Please help...thank you

Only one equation.

5x = 25

x = 5

The other number is 4 * 5 = 20

20 + 5 = 25