The value of x is 12° as angle 63° and angle (5x+3)° will be equal .
What are alternate angles?
Alternate angles are angles that occur on opposite sides of the transversal line and are having the same value.
here, the transverse line a and b are parallel therefore :
angle 63° and angle (5x+3)° will be equal
Now, equating both the angle and finding the value of x :
(5x+3) = 63
5x = 63-3
5x = 60
x = 60/5
x = 12°
Therefore, the value of x is 12° .
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