Question

Find the value of x.78°(12x + 18)O A. 5O B. 7O C. 1O D. 8

Answer 1

Opposite angles are equal, so:

78 = 12x + 18

solve for x

78 - 18 = 12x

60 = 12 x

60/12 = x

x= 5 (option A)