exam Maths Puzzle Numerical Ability

Simpliy: This is so complicated please help.

2/z^2 - 3/2 / 2/5z^2 + 1/3z

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exam Other Question

Can someone help me here?

I need to solve and show proof the following equation:

5x + 8 + 3x -x + 5 = 6x -3

Thanks,
Lisa Please help me with this problem.
√(98x^3)