Question

Find the value of x.

Answer 1

c

Explanation:

Answer 2

7x+(13x-3)+(8x+15)=180

7x+13x-3+8x+15=180

28x+12=180

28x=180-12

28x=168

x=6

The answer is 6.

To check:

7(6)

42 degrees

13x-3

13(6)-3

78-3

75

75 degrees

8x+15

8(6)+15

48+15

63

63 degrees.

42+75+63=180

Therefore, x=6