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Simplifying 20 + -1x = 2(x + 7) Reorder the terms: 20 + -1x = 2(7 + x) 20 + -1x = (7 * 2 + x * 2) 20 + -1x = (14 + 2x) Solving 20 + -1x = 14 + 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. 20 + -1x + -2x = 14 + 2x + -2x Combine like terms: -1x + -2x = -3x 20 + -3x = 14 + 2x + -2x Combine like terms: 2x + -2x = 0 20 + -3x = 14 + 0 20 + -3x = 14 Add '-20' to each side of the equation. 20 + -20 + -3x = 14 + -20 Combine like terms: 20 + -20 = 0 0 + -3x = 14 + -20 -3x = 14 + -20 Combine like terms: 14 + -20 = -6 -3x = -6 Divide each side by '-3'. x = 2 Simplifying x = 2
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