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

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The equation is $\"\"$ .

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Apply subtraction property of equality: Subtract 2g from each side.

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$\"\"$

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$\"\"$ (Apply commutative property of addition: $\"\"$ )

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

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

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

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Apply addition property of equality: Add 1 to each side.

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$\"\"$

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

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

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$\"\"$ (Add: 12 + 1 = 13)

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$\"\"$

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$\"\"$

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Check:

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To substitute $\"\"$ in $\"\"$ .

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

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

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

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

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The equality is true $\"\"$

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The equality solution is $\"\"$ .