book Maths Puzzle Numerical Ability

I am having trouble solving this inequality. Please help me. Thanks

-6 < 5y - (2y - 9)

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I would like help with problem #48 in my text book. I'm not really sure how to type or symbolize a radical sign on this, so "sqrt" will be the same as a radical sign. This is the Write the equation of the line in slope- intercept form.
12.) The slope is 3; the y - interecept is -2