The sum of two integers is 7. their difference is 9. what are the two integers?

Step-by-step explanation:

x+y=7

x-y=9

solve similtaneously

x=-1

y=8

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

it goes right