Answer:
7
Step-by-step explanation:
5 x 7=35
55+35=90
Option B.
As the general angle is 90°, subtract the given angle (55°) from the general angle (90°).
90° ➖ 55°= 35.
Then, divide it by the coefficient of x (the unknown).
35 ➗ 5= 7
Therefore, the answer is 7.
