Question

4(3z-1)-3(z+5)=6(z+1)

Answer 1

Distributive property

Answer 2

4(3z-1)-3(z+5)=6(z+1)
would become
12z-4-3z-15=6z+6
Now combine like terms:
9z-19=6z+6
Edit equation so each group of like terms are in separate sides:
9z=6z+25.....because 19 is added to 6
Then....
3z=25......because 6z is subtracted from 9z
Finally...
z=25/3 or 8.33....because 3 is divided by 25 to find x.

Hope it helped:)