Find the measure of an angle, whose supplement measures eight times its measure
Let the measure of the angle be x degrees,
the measure of its supplement will be 180 -x,
therefore, x = (180-x)/8 since 180 - x is eight times its measure.
Now you can solve for x:
x = (180-x)/8
8 x =180-x
8x + x = 180
9x = 180
x = 20 degrees
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