exam Maths Puzzle Numerical Ability

6 - 5[8-(2y-4)]
can you help me? I am not sure if the brackets are multiplied or not.
I came up with -54-10y and 8-(2y-4)

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exam Other Question

determine graphically the point of intersection between the lines defined by y=-2x+6 and 8=5x-y.


i have no idea how to do this so i coudnt show my work. sorry.
I am asked to find the solution set to the following problem:

1/k-1 + 1/k+2 = 3/k^2+k-2

That is, 1 divided by k-1 plus 1 divided by k+2 equals k squared plus k-2

Please he