Question 193121
let  x+y=33000,,,,x=33000-y
where  x  &  y  are  amounts  invested
970=.04x+.0225y
970=.04(33000-y)+.0225y=1320-.04y-.0225y
970=1320-.0175y
-350=-.0175y
y=20,000

x-33000-y=33000-20000=13000

check,,,13000(.04)+20000(.0225)=520+450=970  ok