Question

How do you solve `2x+4y=6` and `2x+y= -3` using substitution?

Answer 1

`x=-3`
`y=3`

Explanation:

`2x+4y=6" "color(red)(2x=6-4y)`
`color(red)(2x)+y=-3`
`6-4y+y=-3`
`-3y=-6-9`
`3y=9`
`y=9/3" "y=3`
`2x+4(3)=6" "2x+12=6`
`2x=6-12" "2x=-6`
`x=-6/2`
`x=-3`