Let's fill in the statements and reasons for the proof step-by-step to prove \( x = -1 \).
-
Statement (1s): \(-2(x - 4) = 2x + 12\)
Reason (1r): Given. -
Statement (2s): \(-2x + 8 = 2x + 12\)
Reason (2r): Distributive property. -
Statement (3s): \(-2x - 2x + 8 = 12\)
Reason (3r): Subtracting \(2x\) from both sides. -
Statement (4s): \(-4x + 8 = 12\)
Reason (4r): Combine like terms. -
Statement (5s): \(-4x = 4\)
Reason (5r): Subtracting 8 from both sides. -
Statement (6s): \(x = -1\)
Reason (6r): Division property of equality (dividing both sides by -4).
The complete proof structure would then look like this:
1s: \(-2(x - 4) = 2x + 12\)
1r: Given.
2s: \(-2x + 8 = 2x + 12\)
2r: Distributive property.
3s: \(-2x - 2x + 8 = 12\)
3r: Subtracting \(2x\) from both sides.
4s: \(-4x + 8 = 12\)
4r: Combine like terms.
5s: \(-4x = 4\)
5r: Subtracting 8 from both sides.
6s: \(x = -1\)
6r: Division property of equality (dividing both sides by -4).
This provides a complete logical flow to prove that \( x = -1 \).