Solving Word Problems

1. Write out the 2 equation for this.
If a sofa and a chair cost $850.00 as a set. The sofa cost $100.00
more than twice as much as the chair.

2. A boat travels 24 miles upstream in 3 hours. It takes 3 hours to go 36 miles down stream.

What are the to equations?
what is the speed of the boat in still water?
what is the speed of current?

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...the speed of the boat in still water be x miph and let the speed of the current be y miph

Time = Distance/Net ...