Answer:
x = 20
Step-by-step explanation:
The three angles form a right triangle so the sum of the angles is 90 degrees.
x + 2x+x+10 = 90
Combine like terms
4x+10 = 90
Subtract 10 from each side
4x+10-10=90-10
4x = 80
4x/4= 80/4
