Question 1159051
I'm assuming you meant $20,000


let 
x= amount invested in bonds that made 8% profit
y= amount invested in bonds that made 7% profit
x+y=20,000
^This means that 
x=20,000-y
y=20,000-x


.08x= profit on the 8% bonds
.07y= profit on the 7% bonds
.08x=.07y+700...... (substitute in the value of x in terms of y to solve)
.08(20,000-y)=.07y+700.... (distribute)
1600-.08y=.07y+700....(Inverse operations)
900=0.15y
y=6,000


Anne invested $6000 in the 7% bonds.

I hope this helped!