Question

A triangle has three angles. The first angle measures 20 less than a number. The second triangle is three

times the number. The third is the number. What are the measurements of each of the three angles in this
triangle?

Answer 1

first angle is 20, 2nd is 120, 3rd is 40.

Explanation:

with these words, "20 less than a number, Three

times the number, is the number." We can set up the equation x-20+3x+x = 180. combine like terms and we get 5x-20=180. add 20 to both sides to get 5x=200 then divide 200 by 5x to get x = 40. We can then plug 40 into each of the expressions, x-20, 3x, x, to get our angles.