All angles are of triangle and thus give sum of 180⁰
x + 5 + 7x - 5 + x = 180⁰
9x = 180⁰
x = 20⁰
Answer:

Step-by-step explanation:
we know that
Using proportion

The answer is -3/4 because the slope of the line is negative and to get the answer find where the line crosses a number and count from one point to another