exam Maths Puzzle Numerical Ability

3y-9x=30
How do I graph this equation?

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exam Other Question

A disc jockey must play 12 commercial spots during 1 hour of a radio show. Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 8 Suppose you deposit $80 in a savings account that pays an annual intrest rate of 6%. How much interest would you earn in 9 months ?