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January 25, 2015

January 25, 2015

Posted by **Paula** on Monday, March 7, 2011 at 11:36am.

- Algebra -
**Reiny**, Monday, March 7, 2011 at 11:58amspeed of boat in still water ---- x mph

speed against current = x-1.5

speed downstream = x+1.5

time to go 75 miles downstream = 75/(x+1.5)

time to go 52 miles upstream = 52/(x-1.5)

so 75/(x+1.5) = 52/(x-1.5)

cross-multiply and solve for x

- Algebra -
**Paula**, Monday, March 7, 2011 at 12:40pmso answer is 8?

76x - 114 = 52x + 78

24x = 192

x = 8

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