Question

Solve for z
2z − 4 = 4
Please also explain how to do it!

Answer 1

Answer: z=4

Explanation:

Move all terms not containing z to the right side of the equation.

2z=4+4

Add 4 and 4.

2z=8

Divide each term by 2 and simplify.

z=4

Answer 2

2z−4=4

Step 1: Add 4 to both sides.

2z−4+4=4+4

2z=8

Step 2: Divide both sides by 2.

2z

2

=

8

2

z=4

Answer:

z=4