There are two figures. The sum of both figures is

99. If the first is 9 short of second. What is the second figure?

1 answer

Let's define the two figures. Let the first figure be \( x \) and the second figure be \( y \).

According to the problem, we have the following two equations:

  1. The sum of both figures is 99: \[ x + y = 99 \]

  2. The first figure is 9 short of the second: \[ x = y - 9 \]

Now, we can substitute the expression for \( x \) from the second equation into the first equation:

\[ (y - 9) + y = 99 \]

Combining the \( y \) terms:

\[ 2y - 9 = 99 \]

Now, add 9 to both sides:

\[ 2y = 99 + 9 \] \[ 2y = 108 \]

Next, divide both sides by 2 to solve for \( y \):

\[ y = \frac{108}{2} = 54 \]

Thus, the second figure \( y \) is 54.

To verify, we can find \( x \):

\[ x = y - 9 = 54 - 9 = 45 \]

Now, check the sum:

\[ x + y = 45 + 54 = 99 \]

Both conditions are satisfied. Therefore, the second figure is indeed \( \boxed{54} \).