Question

Based on the figure below, what is the value of x?

3
9
12
15

Answer 1

The triangle is 90*
90-30=60. 60-15=45. 45/5=9
x=9

Answer 2

since this is a right triangle the total degrees have to be 90

5x + 15
5 x 9 = 45
45 + 15 = 60
= 5(9) + 15

60 + 30 = 90

the answer is 9