Hi,

Sam invested a certain amount of money  at 2.5% and $1800 more at 4%.

Question states***The annual interest that he earned was $150.

*** 

 

       

              x = $1200, amt at 2.5%

Amount invested at 4% was $3000.    ($1200+ $1800)

CHECKING our answer***

  = $30 + $120 =  $150

Wish You the Best in your Studies.

 

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