I think 0 represents the ground.
2v=3-7
2v=-4 divide both sides
v=-2
X = the number of humans and y = the number of horses.
x+y=74
2x+4y=196
Because the number of humans and horses together is 74, and the total number of legs (2 per every human, x, and 4 per every horse, y) is 196. Then, just use elimination to solve.

So, now that you have y, you can plug it into the first equation to find x:

So, x = 50 and y = 24, so there are 50 humans and 24 horses.
The correct answer is B.
Set up an equation and solve:
2x-14=52
2x=66
x=33
sydney is 33 and devaughn is 19
One pair of opposite sides both parallel and congruent implies a parallelogram.