Answer:
How much is each sandwich, fry, and malt? I can out the answer in the comments, I just need more info.
Answer:Hello
I think it's 12
Step-by-step explanation:
Actually at first you should plus this tow parameters:2x-3x+10
and then you can put(-2)instead (x).
Now you find answer.
Sorry it's a bit messy. but I hope you understand and it will help
The given formula 
Solve for y means we have to make y alone
\\
Add -10 on both sides, we get

As there is multiplication sign between r and y so to solve for y, divide both side by r
