book Maths Puzzle Numerical Ability

Solve the following systems by graphing.
x - 2y = 8
3x - 2y = 12
: If you are unable to graph, follow these instructions:
State in words exactly where the points should be loca

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book Other Question

Please help me simplify this question

9(sqrt3x) + (sqrt27x)

A)18(sqrt3x)
B)9(sqrt3x) + 3(sqrt9x)
C)9(sqrt6x)
D)12(sqrt3x)
Factor the equation

10(y+7)-x(y+7)

thank you