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

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The equation is $\"\"$

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Apply Divison property of equality: Divide eachside by 4.

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$\"\"$

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$\"\"$ (Cancel common terms)

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

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$\"\"$ (Distributive property: a(b + c) = ab + ac)

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$\"\"$

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

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$\"\"$ (Commutative property: a+b=b+a)

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

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$\"\"$ (Additive identity property : $\"\"$ )

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

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$\"\"$ (Subtracct 12 from each side)

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

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$\"\"$ (Additive identity property : $\"\"$ )

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

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$\"\"$ (Cancel common terms)

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

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Graph the solution set on a number line $\"\"$

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Check:

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To check, substitute -1, a number and equals to -1, in $\"\"$ . $\"\"$ (Substitute $\"\"$ )

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

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

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The equlity is true.

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$\"\"$

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The equality solution is $\"\"$ .