SOLUTION: Jerry invested 2500 in a policy that pays 6% annually. How much more money does jerry need to invest at 3%that he gets an invest that is equal to 4% of the entire investment anuall
Let x be "how much more money does jerry need to invest at 3%".
Then your equation is
interest + interest = total interest, or
0.06*2500 + 0.03*x = 0.04*(2500+x)
Simplify and solve it for x.