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The equations are and .
Find .
(Second equation)
(Subtract from each side)
(Apply additive inverse property: )
(Multiply each side negative sign)
Find .
(First equation)
(Substitute )
(Distributive property: )
(Combine like terms)
(Add to each side)
(Apply additive inverse property: )
(Divide each side by )
(Cancel common terms)
Find .
(Substitute )
(Multiply)
(Simplify)
Add simplified and values.
Therefore, value is .
Option A is right choice.
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