100 Point Emergency! I am leaving somewhere for a short amount of time but my friend needs help with this equation. Please explain and show all of your hardest work!
P. S If you show a silly or incomplete answer, my friend or I will report you for incorrect behavior.

Thank you for all your help!
~Hocus Pocus

Adjecent angle.

x = 15

Step-by-step explanation:

It's adjecent because it has a common vertex. X=15 becuase its a right angle. So it's 90 degrees. So 4x and 2x added together should equal 90. So you have the equation 2x + 4x = 90. You simplify that to 6x = 90. Then divide 90 by 6. You get 15. Hope this helps!

m∠a is 90°

m∠b is 40°