$\"\"$

\

The inequality is $\"\"$ .

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Case:1 Case:2

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$ \ \

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(Subtract 7 from each side ). (Subtract 7 from each side ).

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$\"\"$ $\"\"$

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$\"\"$

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$\"\"$ $\"\"$

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(Divide each side by 3) (Divide each side by 3)

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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The solutions are -22/3 and 8/3 $\"\"$

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Check: To check the solution Substitute $\"\"$ in the equation.

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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Hence proved.