Answer:
The last answer; 12.
Step-by-step explanation:
In order to solve this, use substitution. Since it gives you an equation for y, substitute that equation in the other formula as y. This will give you:
[tex]6x+3(-2x+4)=?[/tex]
Then simplify:
[tex]6x-6x+12=?[/tex]
Since 6x - 6x cancels out, you are left with 12.
[tex]?=12\\[/tex]
