SOLUTION: Andrew invested some of his money at 7.5% and $350 less at 8%. His total interest income is $437. How much did Andrew invest at 7.5%?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Andrew invested some of his money at 7.5% and $350 less at 8%. His total interest income is $437. How much did Andrew invest at 7.5%?      Log On


   

Question 125539: Andrew invested some of his money at 7.5% and $350 less at 8%. His total interest income is $437. How much did Andrew invest at 7.5%?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
.075X+.08(X-350)=437
.075X+.08X-28=437
.155X=437+28
.155X=465
X=465/.155
X=$3,000 INVESTED @ 7.5$
PROOF
.075*3000+.08(3000-350)=437
225+.08*2650)=437
225+212=437
437=437