$\"\"$

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The system of equations is $\"\"$ .

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To know the value of $\"\"$ we should eliminate $\"\"$ .

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Multiply equation (1) by 3 and (2) by 4.

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$\"\"$

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$\"\"$

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Substiute the value of $\"\"$ in equation $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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The solution of the system is $\"\"$ .