Write a system of equations to describe the situation below, solve using any method, and fill in the blanks.

Jada and her friend Laura are each baking apple pies and tarts for a bake sale, using the same recipes. Jada baked 8 apple pies and 1 apple tart, using a total of 70 apples. Laura made 3 apple pies and 5 apple tarts, which used 54 apples. How many apples does each dessert require?

An apple pie uses
apples and an apple tart requires
apples.

1 answer

To set up a system of equations for the problem, we can define:

  • Let \( p \) be the number of apples needed for one apple pie.
  • Let \( t \) be the number of apples needed for one apple tart.

Now we can create equations based on the information given:

For Jada:

  • She baked 8 apple pies and 1 apple tart, which used a total of 70 apples. This gives us our first equation: \[ 8p + 1t = 70 \tag{1} \]

For Laura:

  • She made 3 apple pies and 5 apple tarts, which used a total of 54 apples. This gives us our second equation: \[ 3p + 5t = 54 \tag{2} \]

Now we have the following system of equations:

  1. \( 8p + t = 70 \)
  2. \( 3p + 5t = 54 \)

Next, we can solve this system using substitution or elimination. Let's use substitution with the first equation. From equation (1), we can express \( t \) in terms of \( p \): \[ t = 70 - 8p \tag{3} \]

Now, substitute equation (3) into equation (2): \[ 3p + 5(70 - 8p) = 54 \]

Distribute \( 5 \) in the equation: \[ 3p + 350 - 40p = 54 \]

Combine like terms: \[ -37p + 350 = 54 \]

Subtract 350 from both sides: \[ -37p = 54 - 350 \] \[ -37p = -296 \]

Now, divide by -37: \[ p = \frac{296}{37} = 8 \]

So, each apple pie requires \( 8 \) apples.

Next, we substitute \( p \) back into equation (3) to find \( t \): \[ t = 70 - 8(8) \] \[ t = 70 - 64 \] \[ t = 6 \]

Thus, each apple tart requires \( 6 \) apples.

Summarizing our results, we have:

An apple pie uses 8 apples and an apple tart requires 6 apples.