Question

How much of a 5 gallon 40% salt solution should be replaced with pure water to obtain 5
gallons of a 15% solution?

Answer 1

using Cramer's Rule

Answer 2

i dont think you use cramers rule here

Answer 3

is there any way to do this using matrices? this is my linear algebra homework

Answer 4

you can do
( 2 - x) / 5 = .15 , that will work

Answer 5

how did you get this equation?

Answer 6

ok nvm

Answer 7

brb, afk