Donnie deli man delivered 595 box lunches for the robotics convention. There were 20 more turkey sandwiches then roast beef. There were twice as many roast beef has PB&J. How many of each type of BoxLunch did Donnie delivered?

250 turkey sandwiches were delivered.

There were 230 roast beef delivered.

115 PB&J were delivered.

Step-by-step explanation:

This question is solved using a system of equations.

I am going to say that:

x is the number of turkey sandwiches.

y is the number of roast beef.

z is the number of PB&J.

Donnie delivered 595 box lunches

This means that

There were 20 more turkey sandwiches then roast beef.

This means that

There were twice as many roast beef has PB&J.

This means that .

So in the second equation, we have that

Replacing this in the first equation:

115 PB&J were delivered.

250 turkey sandwiches were delivered.

So

There were 230 roast beef delivered.