Question

Question #d3147

Answer 1

`y = -1`

Explanation:

We have:

`x = 2y + 3` and `4x - 5y = 9`

Thus we can substitute the x from the first equation into the second one like so:

`4(2y + 3) - 5y = 9`

Then we can distribute and combine like terms.

`8y + 12 - 5y = 9`
`3y + 12 = 9` Add the y values together
`3y = -3` Divide both sides by 3
`y = -1`