$\"\"$

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The equation is $\"\"$ .

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The matrices have the same dimensions and the corresponding elements are equal. Form the two linear equations by writing the sentences to show the equality.

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$\"\"$ Equation(1)

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$\"\"$ Equation(2)

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$\"\"$

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Solve the system using substitution method.

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The first equation is $\"\"$ .

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Apply subtraction property of equality: If $\"\"$ , then $\"\"$ .

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

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Apply commutative property of addition: a + b = b + a.

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$\"\"$

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

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$\"\"$ (Divide each side by 3)

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$\"\"$ (Cancel common terms) $\"\"$

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Substitute $\"\"$ in second equation.

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$\"\"$

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Apply multiplication property of equality: if $\"\"$ , then $\"\"$ . $\"\"$ (Multiply each side by 3)

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$\"\"$ (Cancel common terms)

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

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

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Apply addition property of equality: if $\"\"$ , then $\"\"$ .

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$\"\"$ (Add 13 to each side)

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$\"\"$ (Apply Additive inverse property: $\"\"$ 13 + 13 = 0)

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

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Apply division property of equality; if $\"\"$ , then $\"\"$ .

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$\"\"$ (Divide each side by 8)

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

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Substitute $\"\"$ in first equation.

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$\"\"$

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According to subtraction property of equality: if $\"\"$ , then $\"\"$ .

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

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Apply commutative property of addition: a + b = b + a.

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$\"\"$

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$\"\"$ (Apply Additve inverse property: 2 $\"\"$ 2 = 0)

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

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$\"\"$ (Divide each side by 3)

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$\"\"$ (Simplify)

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$\"\"$

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The solution is $\"\"$ .