Question

solve the linear equation
12=-2(-9-3z)

Answer 1

First, distribute the -2

Answer 2

ok

Answer 3

what did you get?

Answer 4

12=18+6z

Answer 5

Good, now in order to solve for z, you have to get z completely by itself. Let's start that by subtracting 18 from both sides. What did you get?

Answer 6

12=6z

Answer 7

Well, you have to subtract 18 from both sides so,

12 - 18 = 18 - 18 +6z

try that

Answer 8

-6=6z

Answer 9

Thats right good, so now to get z by itself, in this case you divide both sides by 6

What does that give you?

Answer 10

-1

Answer 11

Thats right! z = -1

Answer 12

With these problems you can always check your answer, by substituting the value in for the variable

Answer 13

thank you