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Simplifying 12 = 20 + -2x Solving 12 = 20 + -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. 12 + 2x = 20 + -2x + 2x Combine like terms: -2x + 2x = 0 12 + 2x = 20 + 0 12 + 2x = 20 Add '-12' to each side of the equation. 12 + -12 + 2x = 20 + -12 Combine like terms: 12 + -12 = 0 0 + 2x = 20 + -12 2x = 20 + -12 Combine like terms: 20 + -12 = 8 2x = 8 Divide each side by '2'. x = 4 Simplifying x = 4
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