Question

The sum of the angle measures of any triangle is 180 degrees. Suppose that one angle in a triangle has a degree measure of 6+x7 and another has a degree measure of 3x-5 . Write an expression for the degree measure of the third angle in the triangle.

Answer 1

(180-(6+7x))-(3x-5)
or
180-(10x+1)

Answer 2

since a triangle has 180 degrees

add the 2 known angles and subtract that from 180

180 - (6+x7 +3x-5)