# Thread: I need help with this math review question!

1. ## I need help with this math review question!

Solve 6z - 2(z+4)=3(9-z)

2. ## Re: I need help with this math review question!

really?

just expand both sides out, simplify it, and solve it. It will just be a linear equation.

you can do it by eye....

Spoiler:
$(6-2)z - 8 = 27 - 3z$

$(6 - 2 + 3)z = (27+8)$

$7z = 35$

$z=5$

3. ## Re: I need help with this math review question!

Oh shoot, rookie error but it’s been a while �� thank you

4. ## Re: I need help with this math review question!

Personally, I would have done this in a more basic way:
6z - 2(z+4)=3(9-z)
6z- 2z- 8= 27- 3z
4z- 8= 27- 3z
Add 8+ 3z to both sides:

4z+ 3z= 27+ 8
7z= 35

z= 35/7= 5.

Check: if z= 5, 6z - 2(z+4)= 6(5)- 2(9)= 30- 18= 12 and 3(9- z)= 3(9- 5)= 3(4)= 12. Yes, those are equal.