exam Maths Puzzle Numerical Ability

graph the function y=f(x)=x^2

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exam Other Question

My study question asks....Solve the following systems of equation by any method.

All I am asking for is the name of a method so I can look up the order or way to solve it.

3x-2y=12

and

2x+y=8

Thanks! can someone please help me solve and understand this division and simplify it?

-9-sqrt{{{108}}}/3