Question 916653
A student spent 60% of her money on books andspent 1/3 of the remainder on notebooks. She had $30 left. How much money did the student have at first?
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let x=money student had at first.
60%x+40%x*(1/3)+30=x
.6x+.4x/3+30=x
lcd:3
1.8x+.4x+90=3x
2.2x+90=3x
.8x=90
x=112.50 
money student had at first=$112.50