Question 149677
.18x+.12*3x=85,000
.18x+.36x=85,000
.54x=85,000
x=85,000/.54
x=157,407.40 invested @ 18%
3*157,407.40=472,222.20 invested @ 12%
proof:
.18*157,407.40+.12*472,222.20=85,000
28,333.33+56,666.67=85,000
85,000=85,000