# How do you solve 3= 9- z?

Dec 19, 2016

The answer is $6$.

#### Explanation:

To get the answer to this problem, $6$, you have to isolate the variable. This means you have to get the variable by itself.

As you can see in the problem, the variable, $z$, is being subtracted from $9$. The first step to isolating the variable is to subtract 9 from both sides. If you do this, the 9 will disappear from the right side. This is because you performed the inverse operation of the operation that is happening.

$3 - 9 = 9 - z - 9$

$- 6 = - z$

There is one more step to isolate the variable. You have to divide the variable, currently $- z$, by $- 1$. This will get rid of the negative sign next to the variable. After you do this, you will have successfully isolated the variable, and have found the answer.

$6 = z$