Question

How do you solve `1.8x+3y=3` and `-2x-2.5y=-5`?

Answer 1

`x=5,y=-2`

Explanation:

Fro the second equation we get

`-2x=-5+5/2y`
`x=5/2-5/4y`
plugging this in the first equation we get

`9/5(5/2-5/4y)+3y=3`
`9/2-9/4y+3y=3`
from here we get

`y=-2`
so
`x=5`