X - (X)(.20) = $120
X (1 - .20) = $120
X (.80) = $120
X = $150
Original price of the boots was $150.
Hello there!
First you had to solving by the fractions parts.

Then you reducing by the fraction parts of 12/9.

And finally, you simplify by the fraction parts of 4/3.

Solution by Formulas
Applying the fractions formula for addiction.



Simplifying 108/81 and the answer is

Hope this helps!
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-Charlie
180 = x + x+2 + x+1
180=3x+3
177= 3x
x = 59
Angle A = 59 +2 = 61 degrees