My instructor has given us an extra credit sheet and it has this word problem that must be solved using cramer's rule. I know how to apply or solve using cramer's rule but I can't seem to properly create a system of equations. Maybe you guys could help me.
Jenny receives $1,270 per year from three different investments totaling $20,000. One of the investments pays 6%, the second one pays 8%, and the third one pays 5%. If the money invested at 8% is $1,500 less than the amount invested at 5%, how much money has jenny invested in the investment that pays 6%?