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Simplifying -4x + -12 = 4(x + 7) Reorder the terms: -12 + -4x = 4(x + 7) Reorder the terms: -12 + -4x = 4(7 + x) -12 + -4x = (7 * 4 + x * 4) -12 + -4x = (28 + 4x) Solving -12 + -4x = 28 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. -12 + -4x + -4x = 28 + 4x + -4x Combine like terms: -4x + -4x = -8x -12 + -8x = 28 + 4x + -4x Combine like terms: 4x + -4x = 0 -12 + -8x = 28 + 0 -12 + -8x = 28 Add '12' to each side of the equation. -12 + 12 + -8x = 28 + 12 Combine like terms: -12 + 12 = 0 0 + -8x = 28 + 12 -8x = 28 + 12 Combine like terms: 28 + 12 = 40 -8x = 40 Divide each side by '-8'. x = -5 Simplifying x = -5
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