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Let $\"\"$ be the number of servings of the chicken, in which each serving has $\"\"$ of protein,

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$\"\"$ of carbohydrates and $\"\"$ of calicium.

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Let $\"\"$ be the number of servings of the corn in which each serving has $\"\"$ of protein,

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$\"\"$ of carbohydrates and $\"\"$ of calicium.

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Let $\"\"$ be the number of the number of servings of $\"\"$ milk in which each serving has $\"\"$ of

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protein, $\"\"$ of carbohydrates and $\"\"$ of calicium.

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Protein equation : $\"\"$ .

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Carbohydrate equation : $\"\"$

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Calcium Equation : $\"\"$ .

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

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Multiple to each side the equation $\"\"$ by $\"\"$ .

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$\"\"$

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Multiple to each side the equation $\"\"$ by $\"\"$ .

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$\"\"$

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Add equation $\"\"$ and equation $\"\"$ to eliminate $\"\"$ .

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$\"\"$

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Multiple to each side the equation $\"\"$ by $\"\"$ .

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$\"\"$

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Multiple to each side the equation $\"\"$ by $\"\"$ .

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$\"\"$

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Add equation $\"\"$ and equation $\"\"$ to eliminate $\"\"$ .

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$\"\"$

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Multiple to each side the equation $\"\"$ by $\"\"$ .

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$\"\"$

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Multiple to each side the equation $\"\"$ by $\"\"$ .

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$\"\"$

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Add equation $\"\"$ and equation $\"\"$ to eliminate $\"\"$ .

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$\"\"$

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

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$\"\"$

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

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$\"\"$

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The solution is $\"\"$ and $\"\"$ .

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Therefore the dietitian should serve $\"\"$ servings of chicken, $\"\"$ serving of corn and $\"\"$ servings of $\"\"$ milk.

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The dietitian should serve $\"\"$ servings of chicken, $\"\"$ serving of corn and $\"\"$ servings of $\"\"$ milk.