algebra
posted by Sarah .
At work one day, Erica Franz received 36 packages. Speedy Delivery delivered three times as many as Ralph's Express delivered four more than send quick package service . how many packgeds did each service deliver to Erica

SD=3RE
RE=SQPS+4
SD+RE+RE+SQPS=36
3RE +RE+RE+RE4=36
go from there.
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