write and solve an equation to find the size and angle of x
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Answer:
Let this line = AB
We can see that line AB is a straight line,
therefore = 180° --(1)
From figure:-
angle x + angle 2x + 90° (from figure) = 180° (from 1)
= 3x + 90° = 180°
= 3x = 180° - 90°
= 3x = 90°
= x = 90°/ 3
= x = 30°
Therefore, x = 30° and 2x = 2×30°= 60°
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