+326 One day, a person went to a horse racing area. Instead of counting the number of humans an horses, he counted 74 heads and 196 legs. How many humans and horses were there?
A.
37 humans and 98 horses
B.
24 horses and 50 humans
C.
31 horses and 74 humans
D.
24 humans and 50 horses
+2489 Use these equations to solve:
\(x+y=74 \tiny \text { Total heads; x = number of humans and y = number of horses} \\ 2x+4y=196 \tiny \text{ Total legs: each human has two and each horse has 4}\\ \text { Solve for x and y}\\ \)
Solve the following system:
{x + y = 74 | (equation 1)
2 x + 4 y = 196 | (equation 2)
Swap equation 1 with equation 2:
{2 x + 4 y = 196 | (equation 1)
x + y = 74 | (equation 2)
Subtract 1/2 × (equation 1) from equation 2:
{2 x + 4 y = 196 | (equation 1)
0 x - y = -24 | (equation 2)
Divide equation 1 by 2:
{x + 2 y = 98 | (equation 1)
0 x - y = -24 | (equation 2)
Multiply equation 2 by -1:
{x + 2 y = 98 | (equation 1)
0 x+y = 24 | (equation 2)
Subtract 2 × (equation 2) from equation 1:
{x+0 y = 50 | (equation 1)
0 x+y = 24 | (equation 2)
x = 50 Humans and y=24 Horses
