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06-04-2017
Mathematics

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06-04-2017

Note how angle GFE forms a right angle, which is 90 degrees.
Since the line cuts that angle into two smaller angles, intuitively, these angles add up to 90 degrees.

So, we can say that 2x + 3x = 90 (angle sum of right angle)
5x = 90
x = 18 degrees

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