The answer would be 7z-17y+24
Explanation
========================================================
The problem is simplify 24-4(5y-6z)+3y-7z
We can focus on the smaller important parts first which would be to multiply -4(5y-6z). A common mistake is that people always forget to multiply with the negative sign.
We multiply -4(5y) + -4(-6z) ===> -20y + 24z
We now have...
24-20y+24z+3y-7z
We combine any like terms and we get...
17z-17y+24
<em>I hope this helps : )</em>
