Question

What is the value of x?

Answer 1

x = 10.

Explanation:

(5x-1) + (8x+5) + (4x+6) = 180 (the 3 angles in a triangle sum to 180 degrees).

5x + 8x+ 4x - 1 + 5 +6 = 180

17x + 10 = 180

17x = 170

x = 10.