Question 214474
1,000*.04+.11x=.10(1000+x)
40+.11x=100+.10x
.11x-.10x=100-40
.-1x=60
x=60/.01
x=$6000  is the amount invested @ 11%.
Proof:
1000*.04+.11*6000=.10(1000+6000)
40+660=.10*7000
700=700