i will give brainliest to correct answer and explanation ah help i don’t understand it

Answer:
15 degrees
Step-by-step explanation:
So you know that the sum of the two angles is 90 degrees, so you can make an equation:
[tex]3x + 45 =90[/tex]
Then, solve:
subtract 45 from both sides
[tex]3x = 45[/tex]
divide both sides by 3
[tex]x = 15[/tex]
This means that x = 15 degrees
Answer:
The answer is 15 degrees.
Step-by-step explanation:
1) Do you see the little square symbol at the bottom right corner? That represents that the angle is a right angle, or a 90 degree angle, in other words.
2) If you know that the first part of the angle is 45 degrees, as it is already labeled, then subtract 90 degrees - 45 degrees = 45 degrees, which is the angle that is left.
3) Set 3x equal to 45 degrees, and solve.
4) So, the equation is 3x = 45; divide by 3 on both sides to get x = 15 degrees.
Hope this helps! Feel free to give me Brainliest if you feel this helped. Have a good day, and good luck on your assignment. :)