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The expression is .

According to addition property of equality: Add to each side.

(Apply commutative property of addition: )

(Apply additive inverse property: )

(Apply additive identity property: )

(Add: ) (Add 10 to each side)

(Apply additive inverse property: )

(Apply additive identity property: )

(Add: )

According to division property of equality: Divide each side by 11.

(Cancel common terms)

__Check:__

To check the solution, substitute in original equation.

(Multiply: )

(Subtract: )

(Subtract: )

Compare the values, the equation is true.

The value of .

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