<PRE><B>Question 100716</B>
((X/8)+.5(X-X/8)+2/7(X-X/8)+25=X
X/8+.5(7X/8)+2/7(7X/8)+25=X
X/8+3.5X/8+2X/8+25=X
(X+3.5X+2X)/8+25=X
6.5X/8-X=-25
(6.5X-8X)/8=-25
-2.5X/8=-25
-2.5X=-25*8
-2.5X=200
X=-200/-2.5
X=80 THE TOTAL AMOUNT OF COINS SHE HAD.
PROOF
80*1/8=10 SHE GAVE T MOTHER. LEAVING HER 80-10=70
70*.5=35  SHE GAVE TO HER BROTHER. LEAVING HER 70-35=35
35*2/7=10 SHE GAVE TO HER DAD. LEAVIN HER WITH 25 COINS.
10+35+10+25=80 COINS. </PRE>