For this case we must solve a system of two equations with two unknowns, given by "x" and "y".
We have:

We multiply (2) by -1:

We add (1) and (3):

Clearing x:

We substitute
in (2)

Thus, the solution of the system is 
Answer:
The solution of the system is 
There is no way to divide them because 133 is odd, so 133 divided by 8 would be 16.625.
Trick question: none, as i can do 600 or 606, etc
Answer: Triangle: x = 40 Line: x = 10
Explanation:
All angles of a triangle adds up to 180. So x + 50 + 90 (the square box represents a 90° angle) = 180
Simplify: x + 140 = 180
So x = 40°
A straight line is 180°
so 7x+110=180
7x= 70
x=10
Answer:
For every x feet of rope purchased, the total cost(y) increases by $6.85.
Step-by-step explanation: