Finding missing angles

Answer:
C
Step-by-step explanation:
It is shown that the whole angle is 90 degree and we have 1 part in numbers so
35+5x=90
5x=90-35
5x=55
x=11
Answer:
The equation you would use for finding x in this picture is 35 + 5x = 90
Step-by-step explanation:
The angles shown in the picture are complementary angles. This means that the angles add up to 90°. So, when you are setting up the equation, you are going to add the terms and equal them to 90°.
35 + 5x = 90