15pts! without graphing, determine whether the system x - 3y = 11 and 2x - 6y = -5 has one solution, no solution, or infinitely many solutions.

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180