Question

Ik it’s x=9 but can someone explain to me how they got that ?

Answer 1

the square on the angle shows that it is a 90 degree angle. The known angle is 46 degrees. 90 - 46 would be 44

So 44=5x-1

Add 1 to each side

45=5x

now just divide each side by five making it

9=x

Hope this helped!