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Simplifying -2x + -4 = (x + 5) + 7 Reorder the terms: -4 + -2x = (x + 5) + 7 Reorder the terms: -4 + -2x = (5 + x) + 7 Remove parenthesis around (5 + x) -4 + -2x = 5 + x + 7 Reorder the terms: -4 + -2x = 5 + 7 + x Combine like terms: 5 + 7 = 12 -4 + -2x = 12 + x Solving -4 + -2x = 12 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -4 + -2x + -1x = 12 + x + -1x Combine like terms: -2x + -1x = -3x -4 + -3x = 12 + x + -1x Combine like terms: x + -1x = 0 -4 + -3x = 12 + 0 -4 + -3x = 12 Add '4' to each side of the equation. -4 + 4 + -3x = 12 + 4 Combine like terms: -4 + 4 = 0 0 + -3x = 12 + 4 -3x = 12 + 4 Combine like terms: 12 + 4 = 16 -3x = 16 Divide each side by '-3'. x = -5.333333333 Simplifying x = -5.333333333
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