exam Maths Puzzle Numerical Ability

write as a single log:
2log2+3logx-1/2[log(x+3)+log(x-2)]

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exam Other Question

I need to solve this problem by using the linear combination method. Here is the equation: 3x+2y-z=8
-3x+4y+5z=-14
x-3y+4z=-14
If you can pl (64x^-6)^2/3