exam Maths Puzzle Numerical Ability

Please help me with this problem
A rectangular hole 2 centimeters wide and x centimeters long is cut in a rectangular sheet of metal 5 centimeters wide and y centimeters long. The

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exam Other Question

will someone please help me sole this problem. It says to multiply or divide and simplify: 2x^2+x-3/2x^2+5x+2/3x^2+x-4/3x^2+10x+8 How many liters of a 70% acid solution are needed to be mixed with 18 liters of a 10% acid solution to get a mixture which is 25% alcohol?