Answer:
100
Step-by-step explanation:
All angles in a triangle equal to 180.
80+20=100
180-100=80
The line is 180
180-80=100
Using linear pairs,

By the exterior angle theorem,

The solution to the system of equations is (x, y) = (10, 14), where x is the number of 3-point questions and y is the number of 5-point questions. The appropriate choice is ...
The test contains 10 three-point questions and 14 five-point questions. (2nd selection)
The answer is #2. 3/2. The dot rises 3 lines and moves to the right 2 lines.

Solution:
Given equation is
.
To solve the equation by step by step.
Step 1: Given

Step 2: Combine like terms together.
Plus symbol changed to minus when the term goes from right to left (or) left to right of the equal sign.

Step 3: Subtract the fractions in the left side.

⇒ 
Step 4: Divide both side of the equation by 3, we get


Hence, the answer is
.