Solve for x if two adjacent angles form a straight line and their measures are 2x degrees and 3x degrees

Answer 1

This is really simple. The two angles (let's call them A and B) form a straight line, which is 180 degrees.

The equation now is very simple

A + B = 180 degrees

We also know that A is 2X and B is 3X

so with a simple substitution, we get

(2X) + (3X) = 180

5X = 180

X = 180/5 = 36 degrees

A = 2X = 72 degrees

B = 3X = 108 degrees