Question

George Johnson invested some money at 3.5% interest, and $5000 more than three times this amount at 4%. He earned $1440 in interest. How much did he invest at 4%?

Answer 1

good lord

Answer 2

lets call the amount invested at \(3.5\%\) say \(x\)
then the amount invested at \(4\%\) is \(3x+5000\)

Answer 3

we know
\[0.03x+0.04(3x+5000)=1440\] and see need \(x\)

Answer 4

*need

Answer 5

this time multiply by 100 and get
\[3x+4(3x+5000)=144,000\]

Answer 6

so 15x=124,000

Answer 7

whoa another mistake on my part , it was \(3.5\%\)

Answer 8

im lost lol