I think that the answer is second one
Answer:
Are you solving for x? If so, x = 6
Answer:
80 questions
Step-by-step explanation:
You can write a proportion to solve this. A proportion is an equation that sets two ratios equal.
The first ratio is 60/x where x is the number of questions. The second ratio is 75/100. This is the percent you got on the test. Cross multiply to sole for x.

Answer:
Every point on a horizontal line has the same y-value. Use the y-value of the point to find the equation of the horizontal line.
y=4
Answer:
4
Step-by-step explanation:
15x+20 = 40 +10x
x = 4