Homework Help: math

Posted by Katherine on Monday, December 6, 2010 at 5:50pm.

Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what Henry had. How many marbles did Andy have in the beginning?

please help me

math - PsyDAG, Tuesday, December 7, 2010 at 10:04pm
A = H - .2

A - 80 = .5(H + 80)

Substitute H-.2 for A in the second equation and solve for H. Put that value in the first equation to find A. Check by putting both values in the second equation.
math - butt caca, Tuesday, February 21, 2012 at 5:52pm
butt ugly!!!!! fuguir it out!!!

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