Question

Question #abbc0

Answer 1

`(x,y)=(-4,5)`

Explanation:

If `3color(red)x+4y=8`
and `color(red)x=color(red)(16-4y)`
then
`color(white)("XX")3(color(red)(16-4y))+4y=8`

`color(white)("XX")48-12y+4y=8`

`color(white)("XX")40=8y`

`color(white)("XX")y=5`

and since `x=16-4y`
`color(white)("XX")x=16-4 * 5=-4`