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

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The equations are

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$\"\"$ Equation (1)

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$\"\"$ Equation (2)

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Since the coefficients of the b-terms are same, you can eliminate these terms by subtracting the equations. Subtract the equations to eliminate variable b.

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$\"\"$

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Apply division property of equality: If a = b then $\"\"$

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$\"\"$ (Divide each side by –2)

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$\"\"$ (Cancel commmen terms)

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$\"\"$ (Divide: $\"\"$ ) $\"\"$

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Now substitute 2 for a in either equation to find the value of b.

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$\"\"$ (Equation 1)

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$\"\"$ (Replace a by 2)

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Apply subtraction proparty of equality: If a = b then $\"\"$

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$\"\"$ (Subtract 2 from each side)

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$\"\"$ (Commutative proparty: $\"\"$ )

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$\"\"$ (Additive invere proparty: $\"\"$ )

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

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Apply division property of equality: If a = b then $\"\"$

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$\"\"$ (Divide each side by –2)

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$\"\"$ (Cancel commen terms)

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$\"\"$

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The solution is $\"\"$ \ \

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$\"\"$

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The solution is $\"\"$ .

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