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

Question

phi · Answer

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 ?

amruta1202 · Answer

Chk this out

amruta1202 · Answer

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

dumbcow · Answer

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