exam Maths Puzzle Numerical Ability

Solve system by elimination
1/2x+y=22
2x+4y=11

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exam Other Question

4 sqrt(3) minus sqrt(64) plus 6 sqrt( 27) x-3^3/2*x-3/1^2

x^2-9/x+2*x^2-4/x-3

x^2 +5x+4/(x+3)^2 Divided by x+1/ x^2-9