Question

Find the value of x ​

Answer 1

`2x + 70 = 120 \\2x = 120 - 70 \\ 2x = 50 \\ x = (50)/(2) \\ \boxed{x = 25}`

25° is the right answer.

Answer 2

The 2 angles total 120

The 2x angle is 120 - 70 = 50 degrees.

2x = 50

Divide both sides by 2:

x - 25