SOLUTION: MARIE SPENDS 1/5 OF HER MONEY ON CONCERT TICKET AND 62.50 ON CONCERT TICKETS AND BUS FARE. SHE HAS 17.50 LEFT. WHAT DID SHE START WITH?

Question 254518: MARIE SPENDS 1/5 OF HER MONEY ON CONCERT TICKET AND 62.50 ON CONCERT TICKETS AND BUS FARE. SHE HAS 17.50 LEFT. WHAT DID SHE START WITH?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
x/5+62.50+17.50=x
x/5-x=-62.50-17.50
-4x/5=-80
-4x=5*-80
-4x=-400
x=-400/-4
x=100
Proof:
100/5+62.50+17.50=100
20+62.50+17.50=100
100=100