Question

A total of 27000 is invested, part of it at 12% the rest at 13%. the total interest after one year is 3385 how much is invested at each rate

Answer 1

part of it at 12% the rest at 13%.

how many parts is that ? I think 2. give the two parts "names" like x and y

any idea what x and y add up to ?

Answer 2

Chk this out

Answer 3

Where I1 and I2 are interests at 12% and 13% respectively where I= p*r*n/100

Answer 4

set up 2 equations

Money invested:
x + y = 27000

Interest:
.12x + .13y = 3385

solve for x,y using substitution
---> x = 27000 - y
sub into 2nd equation