Question

Find the value of x

A. x = 5
B. x = 13
C. x = 37
D. x = 73

Answer 1

2x-9+x+2x+4 =180
5x -5=180
Add 5 to both sides

5x =185
X= 37

Answer 2

x = 37 → C

the sum of the angles in a triangle = 180° hence

2x + 4 + x + 2x - 9 = 180 → ( simplify left side )

5x - 5 = 180 → ( add 5 to both sides )

5x = 185 → ( divide both sides by 5 )

x =
`(185)/(5)` = 37