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Simplifying 2x + -1(3 + -1x) = x + -7 2x + (3 * -1 + -1x * -1) = x + -7 2x + (-3 + 1x) = x + -7 Reorder the terms: -3 + 2x + 1x = x + -7 Combine like terms: 2x + 1x = 3x -3 + 3x = x + -7 Reorder the terms: -3 + 3x = -7 + x Solving -3 + 3x = -7 + 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. -3 + 3x + -1x = -7 + x + -1x Combine like terms: 3x + -1x = 2x -3 + 2x = -7 + x + -1x Combine like terms: x + -1x = 0 -3 + 2x = -7 + 0 -3 + 2x = -7 Add '3' to each side of the equation. -3 + 3 + 2x = -7 + 3 Combine like terms: -3 + 3 = 0 0 + 2x = -7 + 3 2x = -7 + 3 Combine like terms: -7 + 3 = -4 2x = -4 Divide each side by '2'. x = -2 Simplifying x = -2
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