exam Maths Puzzle Numerical Ability

Find two consecutive odd integers such that seven times the first equals five times the second.

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exam Other Question

How would you solve this equation?

2w^2=18w
I don't recall learning this and I have finals coming up - please help.

The function h(x) was used to generate the following code:
63,18,60,63,30,60,48,69,18,57
Decode this me