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Simplifying (-1x) + 3(-1x) + 20 = x Remove parenthesis around (-1x) (-1x) + 3 * -1x + 20 = x Multiply 3 * -1 (-1x) + -3x + 20 = x Reorder the terms: 20 + (-1x) + -3x = x Combine like terms: (-1x) + -3x = -4x 20 + -4x = x Solving 20 + -4x = 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. 20 + -4x + -1x = x + -1x Combine like terms: -4x + -1x = -5x 20 + -5x = x + -1x Combine like terms: x + -1x = 0 20 + -5x = 0 Add '-20' to each side of the equation. 20 + -20 + -5x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -5x = 0 + -20 -5x = 0 + -20 Combine like terms: 0 + -20 = -20 -5x = -20 Divide each side by '-5'. x = 4 Simplifying x = 4
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