# What quantity of 75 per cent acid solution must be mixed with a 25 solution to produce 480 mL of a 50 per cent solution

What quantity of 75 per cent acid solution must be mixed with a 25 solution to produce 480 mL of a 50 per cent solution?

.75x+.25(480-x)=480*.50 .75x+120-.25x=240 .5x=120 x=240 240 ml of each
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