I NEED HELP ASAP, FIND THE VALUE OF X

To find out:
The value of x.
Solution:
4x + 2x = 90
or, 6x = 90.
or, 6x ÷ 6 = 90 ÷ 6
or, x = 15
Answer:
x = 15
Hope you could understand.
If you have any query, feel free to ask.
Answer:
Solution:
4x+2x= 90 (right angle)
or, 6x = 90
or, x = 90/6
or, x = 15