A certain sum of money is invested at 10%. Twice that amount is invested at 8%. Total amt of interest from both $91. How much is invested at 8%?

Question

Need word problem broken down

Answer 1

Let x = the amount invested at 10%

Let 2x = the amount invested at 8%

.10x + .08(2x) = 91     Multiply both sides of the equation by 100 to remove the decimal points.

10x + 16x = 9100

26x = 9100

x = $350

2x = $700