exam Maths Puzzle Numerical Ability

How many liters of 22% and 12% acetic acid should be mixed to produce 48 liters of 15% acetic acid?

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exam Other Question

Hello out there,I need some help with some tough problems,the first one is,State whether the system is consistent and independent,consistent and dependent,or inconsistent.4x+2y=8 a Find the monthly payments on a $2400 loan made for 18 months at 12% interest rate?

Please assist in solution and how to find solution