Question

What is the value of z?
=

Answer 1

Explanation:

We have 3 angles, 2z, 4z, 42

the sum of these angles equal to 180

2z+4z+42=180

6z=180-42

6z=138

z=138/6=23

z=23

Answer 2

`z=133/6`

Explanation:

All angles in a triangle added up are equal to 180 degrees.

We can make the equation:

`2z+4z+47=180\\6z+47=180\\6z=133\\z=133/6`