Math
posted by Amy .
1. In the lab, Deon has two solutions that contain alcohol and is mixing them with each other. Solution A is 40% alcohol and Solution B is 12% alcohol. He uses 1000 milliliters of Solution A. How many milliliters of Solution B does he use, if the resulting mixture is a 32% alcohol solution?
I need help with this one please

Math 
Steve
.40*1000 + .12x = .32*(1000+x)
x = 400
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