Question 86476
.07X+.06(6,100-X)=405
.07X+366-.6X=405
.01X=405-366
.01X=39
X=39/.01
X=3900 INVESTED @ 7%
6100-3900=2200 INVESTED @ 6%
PROOF
.07*3900+.06*2200=405
273+132=405
405=405