exam Maths Puzzle Numerical Ability

w=-14&w+8=-6

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exam Other Question

Please help me simplify: (- 2a2b3 )2 / ( 2a2b)3 Solve the equation: 1n x = 1n 2 + 1n (3x - 1)
I know the answer is 2/5 from the answers in the back of the book.
I need to know how the solution was solved.

I really appreciate your help.