One canned juice is 15% orange juice another 10% orange juice. how many liters of each should be mixed together in order to get 5l that is 11% orange juice

Equation:
0.15x + 0.10(5-x) = 0.11*5
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Multiply thru by 100:
15x + 10*5 - 10x = 11*5

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5x = 5
x = 1 liter (amt. 15% oj needed)

5-x = 4 liters (amt of 10% oj needed)

There is 240 red cars and there is 400 blue cars because 240/3=80 and 80*5=400