maths

posted by ward

In the lab, Teresa has two solutions that contain alcohol and is mixing them with each other. She uses
4
times as much Solution A as Solution B. Solution A is
17%
alcohol and Solution B is
10%
alcohol. How many milliliters of Solution B does she use, if the resulting mixture has
234
milliliters of pure alcohol?

1. Steve

a = 4b
.17a + .10b = 234
so,
.78b = 234
b = 300

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