Answer:
-2
Assumption:
Find the value of x such that
.
Step-by-step explanation:



Combine like terms:

This is not too bad too factor on the left hand side since 2(2)=4 and 2+2=4.


So we need to solve:

Subtract 2 on both sides:

Let's check:






0 was the desired output of
.
Answer:
Step-by-step explanation:
5z>15-----subtract 2 on both sides
z>3----divide by 5
therefore, z must equal -10, or -4