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Simplifying 12 = 4x + 20 Reorder the terms: 12 = 20 + 4x Solving 12 = 20 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 12 + -4x = 20 + 4x + -4x Combine like terms: 4x + -4x = 0 12 + -4x = 20 + 0 12 + -4x = 20 Add '-12' to each side of the equation. 12 + -12 + -4x = 20 + -12 Combine like terms: 12 + -12 = 0 0 + -4x = 20 + -12 -4x = 20 + -12 Combine like terms: 20 + -12 = 8 -4x = 8 Divide each side by '-4'. x = -2 Simplifying x = -2
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