book Maths Puzzle Numerical Ability

Graph the following linear equations and advise points:
3x-2y=12
and
y=2x+5

thanks!

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book Other Question

Use Eular's formula to find the number of edges in the polyhedrn made up of 5 faces: 2triangles and 3 rectangles. 7n(n)(n)(n)(n)+7n(n)(n)(n)-3n(n)-6n-3