exam Maths Puzzle Numerical Ability

graph the inequality

y-2x<2

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exam Other Question

Help I cannot get this :)
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 One root of x^2-4x+4a=0 is 2-4i. What is the value of a ?