Question 112427
.07x+.11(2x+2000)=3990
.07x+.22x+220=3990
.29x=3990-220
.29x=3770
x=3770/.29
x=$13,000 amount invested @ 7%
2*13,000+2000=26,000+2,000=$28,000 amount invested @ 11%.
proof
.07*13,000+.11*28,000=3990
910+3080=3990
3990=3990