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your ans.
Explanation:
x is invested at 8%, so interest per year is 0.08x.
20000-x is the rest invested at 12%, so interest per year is (20000-x)(0.12)=2400-0.12x
This has to equal the amount of interest gained for 20000*0.11=2200
Therefore, 0.08x+2400-0.12x=2200
-0.04x=-200
multiply both sides by -25
x=$5000 @8% or $400
20000-x=$15000@12%=$1800
They add to $2200, which is 11% of $20000.
hope it will help you
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