word equations college algbra

Question

Leila, Felipe, and Eric served a total of 79 orders Monday at the school cafeteria. Felipe served 7 more orders than Leila. Eric served 2 times as many orders as Leila. How many orders did they each serve?

Answer 1

We know nothing about Leila, so she is L.

Felipe served 7 more than Leila, so Felipe is L+7

Eric served twice as many as Leila, so Eric is 2L

altogether they served 2L + L+7 + L = 79

4L + 7 = 79

4L = 72

L = 18

Leila served 18

Felipe served 25

Eric served 36