SOLUTION: Benjamin invested $12,000 in two CDs. One earned 4% and the other earned 6%. If he earned a total of $620 at the end of the year, how much was invested in each CD? Solve using line

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Benjamin invested $12,000 in two CDs. One earned 4% and the other earned 6%. If he earned a total of $620 at the end of the year, how much was invested in each CD? Solve using line      Log On


   

Question 262878: Benjamin invested $12,000 in two CDs. One earned 4% and the other earned 6%. If he earned a total of $620 at the end of the year, how much was invested in each CD? Solve using linear systems
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Benjamin invested $12,000 in two CDs. One earned 4% and the other earned 6%. If he earned a total of $620 at the end of the year, how much was invested in each CD? Solve using linear systems
Let us assume he invested x in CD1 at 4%
12000-x he invested in CD2 at 6%
0.4x+0.6(1200-x) = 620
0.4x +720 – 0.6x = 620
-0.2x= -100
X= -1000/-0.2
X= 5000 cd1
CD1 $5000
CD2 he invested $7000