book Maths Puzzle Numerical Ability

I need help solving

3x + 1 < -2 or 2x + 3 > 5
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I think it is something like:

3x + 1 -1 < -2 - 1 or 2x + 3 - 3 > 5 - 3
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book Other Question
Sara reduced its price on lawn mowers by $45. The sale price as $169. What was the original price? What would a counterexample be for the question "If 2n + 3 < ,then n is less than or equal to 7"?