You got this bro why do u need our help for
4 (k-6)-(3k+2)=-5
4k-24-3k-2=-5
k-26=-5
k=21
0 right? It's not changing at all.
Answer:

Step-by-step explanation:
Because we are told equivalent expressions for y and z we can plug those in to 2(y+z).

Then simplify by combining like terms of the expressions. Values ending in x^2 can be combined with each other.

Now we can distribute the 2 by multiplying each value in the parentheses by 2.

18 would be the 7th so... hope it helps