A, O and B lie on a straight line segment.
Evaluate x
The diagram is not drawn to scale.

Answer:
x = 36
Step-by-step explanation:
we have,
3x+x+x=180
x+x = 2x so,
3x+2x=180
3x+2x=5x so,
5x=180
that means, x= 180/5
180/5=36
x = 36
to check the answer
3x+x+x=180
if x = 36
3*36+36+36=180
108+36+36=180
180=180
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