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Simplifying 13 + x = 0 + -1(-2x) Remove parenthesis around (-2x) 13 + x = 0 + -1 * -2x Multiply -1 * -2 13 + x = 0 + 2x Remove the zero: 13 + x = 2x Solving 13 + x = 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 13 + x + -2x = 2x + -2x Combine like terms: x + -2x = -1x 13 + -1x = 2x + -2x Combine like terms: 2x + -2x = 0 13 + -1x = 0 Add '-13' to each side of the equation. 13 + -13 + -1x = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -1x = 0 + -13 -1x = 0 + -13 Combine like terms: 0 + -13 = -13 -1x = -13 Divide each side by '-1'. x = 13 Simplifying x = 13
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