Question 147355
x+y+z=4300 (multiply by -.0575 & subtract. You neglected to change the % to decimals.)
.0325x+.04y+.0575z=193
-.0575x-.0575y-.0575z=-247.25  
--------------------------------
-.0255x-.0175y=-54.25
y=3x
-.0255x-.0175*3x=-54.25
-.0255x-.0525x=-54.25
-.078x=-54.75
x=-54.25/-.078
x=695.52 amount invested @ 3.25%
3*695.52=2,086.54 amount invested @ 4%
695.52+2,086.54+y=4,300
y=4,300-695.52-2,086.54
y=1,517.94 amount invested @ 5.75%
proof:
.0325*695.52+.04*2,086.54+.0575*1,517.94=193
22.60+83.46+87.28=193
193~193