SOLUTION: I need a practical application for the following equations: x+p=q; px=q please

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Question 847046: I need a practical application for the following equations: x+p=q; px=q please
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
1. Are those two equations simultaneous, or separate?

2. Think of any application of addition or multiplication in real life. For example if gas costs $3.87/gal and you buy 4 gallons.

and 3. Is this for a school assignment? Because I feel that is a rather odd question for a homework.