Question

Please help me with this

Answer 1

X = 9

Explanation:

Add like-terms and make it equal to the triangle sum theorem which is 180.

7x+8+7x-1+5x+2=180

19x+9=180

-9 -9

Subtract 9 from 9 and 180, then divide both sides by 19.

19x/19 = x

171/19 = 9

So therefore, x=9.

Answer 2

x = 9

Explanation:

(7x + 8) + (5x +2) + (7x - 1) = 180

19x + 9 = 180

19x = 171

x = 9

so first option