Question

3x - 3y = 9 and x + 3y = 12
Elimination

Answer 1

`x=5.25,y=2.25`

Explanation:

We can add the two equations to eliminate the variable
`y` and solve for
`x`:

`3x-3y+x+3y=9+12`

`4x=21`

`x=5.25`

Now, we can use substitution to solve for
`y`:

`x+3y=12` (given)

`5.25+3y=12`

`3y=12-5.25`

`=6.75`

`y=2.25`

Hope this helps :)