SOLUTION: At work one day, Erica Franz received 21 packages. SD delivered twice as many as RE, while RE delivered three more than SQ Package Service. How many packages did each service deliv

Question 273469: At work one day, Erica Franz received 21 packages. SD delivered twice as many as RE, while RE delivered three more than SQ Package Service. How many packages did each service deliver to Erica?
Answer by bobdabuildr(27) (Show Source): You can put this solution on YOUR website!
Let x=no. of packages delivered by SQ
x+3=no. of packages delivered by RE
2(x+3)=no. of packages delivered by SD
x+(x+3)+2(x+3)=21
x+x+3+2x+6=21
4x+9=21
4x=21-9
4x=12
x=3
Plug x back into each of the three companies as listed above and you will have your answer.
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