Answer: x = 55
Step-by-step explanation:
For any right triangle, the two acute angles add to 90 degrees. This means the angles are complementary.
x+35 = 90
x = 90-35
x = 55
Or you could use the idea that all three angles of a triangle add to 180
x+35+90 = 180
x+125 = 180
x = 180 - 125
x = 55
Either way we get the same result.