Hi there! Hopefully this helps!
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<em>Answer to the first equation:</em><u><em> 3.</em></u>
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<em>Answer to the second equation: </em><u><em>7</em></u>
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<em>Answer to the third equation: </em><u><em>-2.</em></u>
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<em>Answer to the fourth equation: </em><u><em>-3</em></u>
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