Question 1012519: How much of each solution, a 30% solution and a 50% solution, would be added together to produce 10 litres of a 45% solution? Found 2 solutions by macston, ikleyn:Answer by macston(5194) (Show Source):
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T=amount of 30% solution; F=amount of 50% solution
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T+F=10L
T=10L-F
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0.30T+0.50F=0.45(10L)
0.30(10L-F)+0.50F=4.5L
3.0L-0.30F+0.50F=4.5L
0.20F=1.5L
F=7.5L
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T=10L-F=10L-7.5L=2.5L
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ANSWER: Add 2.5 liters of 30% solution and 7.5 liters of
50% solution to produce 10 liters of 45% solution.