exam Maths Puzzle Numerical Ability

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Graph the following inequalities.

3x -4y <12

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exam Other Question

How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution Find values for m and b in the following system so that the solution to the system is (-3,4)
5x+7y=b
mx+y=22