Question

I need help with this math please.​

Answer 1

(13.4,-4.2)

Explanation:

The given system has equations:

`20x - 5y = 289`

`22x + 9y = 257`

Multiply the top equation by 9 and

Multiply the second equation by 5:

`180x - 45y = 2601`

`110x + 45y = 1285`

Add the new equations.

`290x = 3886`

`x = 13.4`

Put this into the first equation to get:

`20(13.4) - 5y = 289 \\ 268 - 5y = 289 \\ - 5y = 21 \\ y = - 4.2`