Let x be the amount invested at 5.2%. Your equation is

.052x + .06(25000 - x) = 31350

you solve it

if an investor wants to invest $25000 into two municipal bonds that pay 5.2% and 6% simple interest annually. The investor wants and annual income of 31350. The amount that should be invested at 5.2% is?

answers 18750

6750

6500

6200

6000