exam Maths Puzzle Numerical Ability

I really am having a hard time with this problem. the 2x in the middle confuses me.
-4x is less than or equal to 2x<18

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exam Other Question

Solve the system of equation. If the system is consistent, state the coordinates of the point of intersection. If not consistent, state whether it is inconsistent of dependent.

x-y=3
2x+3y=11 For all r = +/- 2, r squared-5r+6= r squared-4