Piotr Galkowski invested some money at 3.5% simple interest, and $5000 more than three times this amount at 4%. He earned $1440 in annual interest. How much did he invest at each rate?

Question

hero · Answer

Hint: 
.035x+ .04y= 1440
y = 3x + 5000

anonymous · Answer

Can u show me how to break it down an get the awnser please

hero · Answer

You can try to solve the system

anonymous · Answer

What is the x formula please I'm struggleing

hero · Answer

x = the amount of money invested in the first account

hero · Answer

The one where you can receive 3.5% simple interest.

anonymous · Answer

Is the final answer for x 1440-.04y divided by .035?

anonymous · Answer

Thank you

hero · Answer

You have to substitute the expression for y into the first equation to get:
.035x+ .04(3x + 5000) = 1440

Afterwards, you solve for x.

anonymous · Answer

Could I please have the awnser in about to fail  I'm trying my hardest. But I still having trublee

hero · Answer

I suppose you are also taking a test.

anonymous · Answer

Homework that is graded