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Simplifying -1(x + 4) = 28 + 3x Reorder the terms: -1(4 + x) = 28 + 3x (4 * -1 + x * -1) = 28 + 3x (-4 + -1x) = 28 + 3x Solving -4 + -1x = 28 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. -4 + -1x + -3x = 28 + 3x + -3x Combine like terms: -1x + -3x = -4x -4 + -4x = 28 + 3x + -3x Combine like terms: 3x + -3x = 0 -4 + -4x = 28 + 0 -4 + -4x = 28 Add '4' to each side of the equation. -4 + 4 + -4x = 28 + 4 Combine like terms: -4 + 4 = 0 0 + -4x = 28 + 4 -4x = 28 + 4 Combine like terms: 28 + 4 = 32 -4x = 32 Divide each side by '-4'. x = -8 Simplifying x = -8
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