this is math. please help?

Question

find four consecutive intergers whose sum is 130.

Find the measure of the third angle.
(z-30)*, z*

*degree sign


please explain
thanks

Answer 1

1) Let x be the first integer. Then the other three are x + 1, x + 2, and x + 3.

The sum would be:

x + x + 1 + x + 2 + x + 3 = 130

4x + 6 = 130

4x = 124

x = 31

So the four integers are 31, 32, 33, and 34.

2) I'm assuming that's for a triangle, right?

The sum of the angles of a triangle is 180.

Let x be the third angle. Then:

x + z + z - 30 = 180

x + 2z - 30 = 180

x = 210 - 2z

So the third angle would be (210 - 2z)°