-2(2z-7y)-z =?

Do I do distributive property first?

I think I did that and then combined like terms but i keep getting answer incorrect

Question

-2(2z-7y)-z =? 

Do I do distributive property first?

I think I did that and then combined like terms but i keep getting answer incorrect

hartnn · Answer

what u got after distributing -2 ??

anonymous · Answer

-4z+14y-z?

anonymous · Answer

14y+5z?

hartnn · Answer

thats correct
now its just 
-4z-z =... ? 
14y remains as it is....

hartnn · Answer

-4z-z is not 5z
-4z-z = (-4-1)z =... ?

anonymous · Answer

-4z? Ugh This part confuses me bc do I add or multiple? and if I multiple then it would be 4z

hartnn · Answer

its just adding,
here its like 
-ax-bx 
u get (-a-b)x by factoring out x
similarly, -4z-z , by factoring out z, you get (-4-1)z 
and whats -4-1 =... ?

anonymous · Answer

14y-5z :)

unklerhaukus · Answer

$$\color{red}\checkmark$$

hartnn · Answer

yes :)