Question

Michele earned a total of $693 in simple interest form two separate accounts. In an account earning 6% interest, Michelle invested $1,200 more than four times the amount she invested in an account earning 3%. How much did she invest in each account?

Answer 1

t= 4s + 1200
0.06t + 0.03s= 693

0.06(4s+1200) + 0.03s= 693
0.24s + 0.03s+ 72 = 693
0.27s = 621
s = 2300

t= 10400

s is the amount invested at 3%
and t is the amount invested at 6%