Question

Plz show your work! :)

Answer 1

Answer:

x = 19

Step-by-step explanation:

The sum of the three angles is 180°

So,

(5x + 4) + (x - 2) + (3x + 7) = 180

9x + 9 = 180

9x = 180-9

9x = 171

x= 171 ÷ 9

x = 19