Question

If triangle ABC has the following angle measurements, what is the set-up to solve for x?

∠A= 4x - 17


∠B= 3x + 8


∠C= x + 13


4x - 17 + 3x + 8 + x + 13 = 180

4x - 17 = 3x + 8 + x + 13

4x - 17 - 3x + 8 - x + 13 = 180

4x - 17 - 3x + 8 - x + 13 = 180

Answer 1

It would be 4x-17+3x+8+x+13=180, so the first answer

Answer 2

A

Explanation:

The answer is the first one. We've used that in previous questions.

B is wrong. It needs to be equal to something (180 in this case). B is also saying that the first angle is = to the sum of the other two. Not so.

C is wrong. the third angle's x term has to be plus.

D has the same problem.