Question

The sum of the measures of angle K and angle B is 90°.

The measure of angle K is (5x + 15)°
The measure of angle B is 40°
What is the value of x?

Answer 1

value of x is 7

Explanation:

from question

k+b=90

5x+15+40=90

5x=90-55

5x=35

hence, x=7