Question

how much salt must be added to 60 litres of a 20% solution of salt to increase it to a 40% solution of salt? in equation form​

Answer 1

Step-by-step explanation:

you would need to add 20 liters of salt to the 20% mixture in order to get a 40% mixture. since the equation is true, the solution of x = 20 is correct. that's easy to see because, if you add 20 to 12 you get 32, and if you add 20 to 60 you get 80 and it's clear that 32 / 80 is equal to .