exam Maths Puzzle Numerical Ability

please graph
2x + y= 8
2x - y = 0

thank you

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exam Other Question

Can someone please explain this and dumbify it down - thank you so much in advance:

Multiply:
(5√[2] + 3)(√[2] - 2√[3]) Hi,
If F(X)=x^2 and G(X)=3X=1 Then F(G(-2))=?
Thank You!