Um.. Both of those equations are the exact same. Divide both sides of the first equation by 6. You get:

That is the exact same as the second equation. This system has an infinite number of solutions. 5x - 7y = -1 is a line, so basically every point on that line is a solution to the system.
For example,

and

would work, but so would

and
Answer:
125
Step-by-step explanation:
Answer:
Step-by-step explanation:
The second one I believe.
B C and E have a unit rate of 12 yards or second