In the lab, Dale has two solutions that contain alcohol and is mixing them. Solution A is 7% alcohol, and Solution B is 2% alcohol. He uses 600 milliliters of Solution A. How many milliliters of Solution B use if the resulting mixture is a 5% alcohol solution?

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

b, i believe, but not sure.