exam Maths Puzzle Numerical Ability

Please help, i dont understand this!
Are the following lines parallel, perpendicular, or neither?
L1 with equation x - 6y = 24
L2 with equation 6x + y = 6

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exam Other Question

I need help with this equation 2A/3 = 8 + 4A
Simplify. m^2/9/m^4/18