$\"\"$

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The points are A $\"\"$ and M = $\"\"$ $\"\"$ .

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To find: B.

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The midpoint of a segment with endpoints $\"\"$ is $\"\"$

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$\"\"$ (Apply midpoint formula)

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$\"\"$ (Substitute $\"\"$ ) $\"\"$

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So, $\"\"$ (Equate the corresponding terms)

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$\"\"$ (Multiply $\"\"$ to each side)

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$\"\"$ (Cancel common terms)

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

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$\"\"$ (Subtract $\"\"$ to each side)

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$ (Add $\"\"$ to each side)

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$\"\"$ (Add: $\"\"$ )

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The point B is $\"\"$ .

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$\"\"$

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The point B is $\"\"$ .