Answer:
26
Step-by-step explanation:
add both expressions to equal 90 (bc of the right angle)- x+11+2x+1=90
when you solve, you get x=26
A) 26
This is a right angle and the measure of a right angle is 90°
x+11+2x+1 = 90° add like terms
3x + 12 = 90° subtract 12 from both sides
3x = 78 divide by 3
x = 26
