exam Maths Puzzle Numerical Ability

3x^2-7x=0

3x^2+33=2x^2+14x

(x-3)^2=9

(3x-6)^2=4x^2

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exam Other Question

I need to solve the following system of linear inequalities by graphing.

x - 2y > or = 4
x < or = 4 Assume that y varies inversely as x, and y=18 when x=3. Find the constant of variation.

Please help!