Question

Which is the value of x

Answer 1

All of those formulas must add up to 180 degrees, because a straight line is 180 degrees. We could add them all up (x+10+2x+10+4x+3x-5). Add all the x up...(10x) and the numbers...(16). Now we have an equation 10x+16=180. Isolate the x, and you get x=16.4

Answer 2

16.5 is what I got for x you add them up and equal them to 180 because its a straight line