The problem
Click to see the original problem
a=2x+6xz, your solution x=a/2(3z+1) why isn't it, x=a/6z=2
Answer provided by our tutors
The denominator 2(3z+1) could be expanded to 6z+2 but a factored form is the best simplest form. This is also similar to prime factorization, which is used in order to clearly identify cancellations.