7x=2x-35
A 7
B 5
C -5
D -7

X = -7

Step-by-step explanation:

You have to isolate the variable by dividing each side by factors that doesn’t contain the variable.

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