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Simplifying x + -7 + -1(x + 2) = 3x Reorder the terms: x + -7 + -1(2 + x) = 3x x + -7 + (2 * -1 + x * -1) = 3x x + -7 + (-2 + -1x) = 3x Reorder the terms: -7 + -2 + x + -1x = 3x Combine like terms: -7 + -2 = -9 -9 + x + -1x = 3x Combine like terms: x + -1x = 0 -9 + 0 = 3x -9 = 3x Solving -9 = 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. -9 + -3x = 3x + -3x Combine like terms: 3x + -3x = 0 -9 + -3x = 0 Add '9' to each side of the equation. -9 + 9 + -3x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -3x = 0 + 9 -3x = 0 + 9 Combine like terms: 0 + 9 = 9 -3x = 9 Divide each side by '-3'. x = -3 Simplifying x = -3
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