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Simplifying 13 + -2(x + -7) = x Reorder the terms: 13 + -2(-7 + x) = x 13 + (-7 * -2 + x * -2) = x 13 + (14 + -2x) = x Combine like terms: 13 + 14 = 27 27 + -2x = x Solving 27 + -2x = 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. 27 + -2x + -1x = x + -1x Combine like terms: -2x + -1x = -3x 27 + -3x = x + -1x Combine like terms: x + -1x = 0 27 + -3x = 0 Add '-27' to each side of the equation. 27 + -27 + -3x = 0 + -27 Combine like terms: 27 + -27 = 0 0 + -3x = 0 + -27 -3x = 0 + -27 Combine like terms: 0 + -27 = -27 -3x = -27 Divide each side by '-3'. x = 9 Simplifying x = 9
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