Homework Help: math

Posted by jessie on Saturday, June 26, 2010 at 7:43am.

John took all his money out of his savings account. He spent $50 on a radio and 3/5 of what remained on presents. Half of what was left he put back in his checking account, and the remaining $35 he donated to charity. How much money did John originally have in his savings account?

math - Henry, Monday, June 28, 2010 at 3:19pm
Original amount=X Dollars.
Bought 50 dollar radio.
Bal.=X-50
(X-50)-3/5*(X-50)=2/5*(X-50) Bal.
1/2*2/5*(X-50)=1/5*(X-50) Bal.

1/5*(X-50)=35. Solve for X:
X=225=Original Amt.

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