There are 8% salt water and 5% salt water in the laboratory. Now we need to mix these two kinds of salt water to make 3kg salt water with 6% salt. How many grams of these two kinds of salt water are suitable?

There are 8% salt water and 5% salt water in the laboratory. Now we need to mix these two kinds of salt water to make 3kg salt water with 6% salt. How many grams of these two kinds of salt water are suitable?

Suppose 8% brine x g and 5% brine y g are needed
x+y=3000
8%*x+5%*y=3000*6%
To solve the equations, x = 1000; y = 2000
So we need 1000 grams of 8% salt water and 2000 grams of 5% salt water