Question

4000$ is invested at 3% interest. How much money must be invested at 5% interest so that the total interest from the two investments is $195 after a year?

Answer 1

Hi there
4000$ is invested at 3% interest so the interest of this account is
4,000×0.03=120

be invested at 5% interest
the total interest from the two investments is $195

120+0.05x=195
Solve for x to get the amount invested at 5%

120-120+0.05x=195-120 subtract each side by 120

0.05x=195−120

0.05x=75. Divide each side by 0.05

0.05/0.05 X=75/0.05

X=75/0.05

X=1,500 be invested at 5%

Good luck!