?????? yu split 2100$ tween 2 akkounts & get interest for 1 yeer ?????\
1 akkount=7% other=4%
interest=132$
132/2100=0.628571 averaej % interest, so most munee get 7%
0.07*x +0.04*(2100-x)=132
or 7x +4*(2100-x)=13,200
7x-4x+8400=13,200
3x=13,200-8400=4800
x=1,600$
other akkount=2100-1600=500$