SOLUTION: Can someone help me with this? Carla invested $20,000, part at 6% and part at 15%. If the total interest at the end of the year is $1,290, how much did she invest at 6%?

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Can someone help me with this? Carla invested $20,000, part at 6% and part at 15%. If the total interest at the end of the year is $1,290, how much did she invest at 6%?      Log On


   

Question 87031: Can someone help me with this?
Carla invested $20,000, part at 6% and part at 15%. If the total interest at the end of the year is $1,290, how much did she invest at 6%?
Answer by scianci(186) About Me  (Show Source):
You can put this solution on YOUR website!
let x = amt. at 6%. Express the amount at 15% in terms of x. Express 6% of x plus 15% of the remaining amount and set it equal to 1290. Solve the resulting equation for x.