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October 21, 2014

October 21, 2014

Posted by **Becky** on Monday, November 19, 2012 at 7:16pm.

- Math -
**Brenda**, Monday, November 19, 2012 at 7:26pm(4.5 km/hr x X) + (3.5 km/hr x Y) = 40

Where X is the time there and Y is your time back.

X = (40 - 3.5 Y) / 4.5

= 8.88 - 0.77Y

Now plug X back into your original eqn and solve for Y:

4.5 (8.88 - 0.77Y) + 3.5Y = 40

Got it?

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