Jungkook invested a certain amount of money at a 10% interest rate and Php 2000 more than that at a 12% interest rate. His total annual interest earned is Php 1340. How much money did he invest at 12% interest rate?
Jungkook invested a certain amount of money at 10%
interest rate and $2000 more than that at 12% interest rate.
her total yearly interest eanrd is $1340.how much did she invest at each rate?
let x amount invested at 10%
then x+2000 invested at 12%
[interest earned 10%]+[interest earned 12%]=1340
(x)10% + (x+2000) 12% = 1340
"(x)(0.10) +(x+2000)(0.12)= 1340"
"0.1x+0.12x+240=1340"
"0.22x=1100"
"x=\\dfrac{1100}{0.22}=5000"
The amount of money he invests at 12% is (5000+2000)=$7000
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