Use two equations in two variables to solve the following problem. A rancher raises five times as many cows as horses. If he has 144 animals (cows and horses only), how many cows does he have?
A)120 cows
B)100 cows
C)160 cows
D)110 cows
E)90 cows

Question

Quizplus · Accepted Answer

Let the number of horses be $x$ and the number of cows be $5x$. The total number of animals is $x + 5x = 144$. Solving this equation gives $6x = 144$, so $x = 24$. Therefore, the number of cows is $5 \times 24 = 120$.

Use Two Equations in Two Variables to Solve the Following