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

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The equations are

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$\"\"$ Equation(1)

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$\"\"$ Equation(2)

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Solve the second equation for p in terms of q.

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$\"\"$ (Add 4q from each side).

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$\"\"$ (Apply Additive inverse property: $\"\"$ )

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$\"\"$ (Apply Additive identity property: $\"\"$ )

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$\"\"$ (Apply Distributive property: $\"\"$ )

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$\"\"$ (Divide each side by 2)

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$\"\"$ (Cancel common terms)

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$\"\"$

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Substitute $\"\"$ in Equation (2).

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$\"\"$

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$\"\"$ (Apply Distributive property: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Apply Additive inverse property: $\"\"$ )

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$\"\"$ (Apply Additive identity property: $\"\"$ )

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$\"\"$

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$\"\"$

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Substitute $\"\"$ in equation in equation $\"\"$ .

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$\"\"$

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ )

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$\"\"$

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The solution is $\"\"$ .

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