if the total interest after one year is $243.60 how much did she invest in each account

Question

Alex deposited half as much money in a savings account earning 1.9% simple interest as she invested in the money market account that earns 3.4% simple interest 

Answer 1

s = m/2

0.019s + 0.034m = 243.6

 

Since s = m/2, we can swap the two out for each other.

 

0.019(m/2) + 0.034m = 243.6

0.0095m + 0.034m = 243.6

0.0435m = 243.6

m = 5600

 

s = 5600/2

s = 2800