exam Maths Puzzle Numerical Ability

a passenger train can travel 325 mi the same time a freight train takes to travel 200 mi. if the speed of the passenger train is 25 mi/h faster than the speed of the freight train

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I am having trouble with my homework sheets on matrices. Could someone please help with these.
Write the matrix equation as a system of equations and solve the system.
3.) [1 2 3 How many liters of a solution containing 22% sugar and how many liters of anothwer solution containing 31% sugar must be mixed together to make 680 liters of solution containing 27