Question

The sum of two numbers is 100 and their product is 900.

Answer 1

(90,10) (10,90)

Explanation:

`x+y=100\\xy=900`

now solve by substitution

`x=100-y`

so

`xy=(100-y)(y)=900`

your answers are: (90,10) (10,90)

Look at the attached image

Hope this helps!