How would I simplify this problem?

2(r + 3) + 3(r + 7) - 10 simplifies to
2r + 6 + 3r + 21 - 10 simplifies to
5r + 27 - 10 simplifies to
5r + 17.

2(r+3)+3(r+7)-10
=2r+6 + 3r+21-10
=5r+17

Therefore, you are correct. :)

you're correct it's 5r+17

It is :)

2r+ 6 + 3r + 21 - 10 = 5r + 17

if you mean 5r+17 then it is correct. :)

it is