book Maths Puzzle Numerical Ability

Solve for the indicated variable:
2/w - y = z, solve for w

This is how I solved it, I'm I correct?
1/w = z + y/2

Thanks for your help

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book Other Question

I need to simplify the expression (2 to the square root of 27)x (3 to the square root of 32)? This is also a multiple choice A. 72 to the square root of 6 B.18 to the square root Thank you in advance for your help.

Write the equation of the line in both forms:

horizontal line that goes through (3,7)