Most people get this wrong on their first try. Take a close look at the equations and use the correct order of operations before answering.

What is the value of Grass × Horse?

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Solution

Let G = Grass and H = Horse.

From the first equation:

G + H = 16

From the second equation:

G − H = 12

Add the two equations:

2G = 28

G = 14

Substitute into the first equation:

14 + H = 16

H = 2

Now calculate:

G × H = 14 × 2 = 28

Answer: 28