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Simplifying 20 + x = -4(4 + 2x) 20 + x = (4 * -4 + 2x * -4) 20 + x = (-16 + -8x) Solving 20 + x = -16 + -8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8x' to each side of the equation. 20 + x + 8x = -16 + -8x + 8x Combine like terms: x + 8x = 9x 20 + 9x = -16 + -8x + 8x Combine like terms: -8x + 8x = 0 20 + 9x = -16 + 0 20 + 9x = -16 Add '-20' to each side of the equation. 20 + -20 + 9x = -16 + -20 Combine like terms: 20 + -20 = 0 0 + 9x = -16 + -20 9x = -16 + -20 Combine like terms: -16 + -20 = -36 9x = -36 Divide each side by '9'. x = -4 Simplifying x = -4
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