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Question

If $$\overline { a } \times \overline { b } =\overline { a } \times \overline { c } ,\overline { a } \neq \overline { 0 } ,\overline { b } \neq \overline { c } $$, then show that $$\overline { b } =\overline { c } +k\overline { a } ,k\in R$$

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