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Simplifying 1 + 12x = 21 + x Solving 1 + 12x = 21 + 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. 1 + 12x + -1x = 21 + x + -1x Combine like terms: 12x + -1x = 11x 1 + 11x = 21 + x + -1x Combine like terms: x + -1x = 0 1 + 11x = 21 + 0 1 + 11x = 21 Add '-1' to each side of the equation. 1 + -1 + 11x = 21 + -1 Combine like terms: 1 + -1 = 0 0 + 11x = 21 + -1 11x = 21 + -1 Combine like terms: 21 + -1 = 20 11x = 20 Divide each side by '11'. x = 1.818181818 Simplifying x = 1.818181818
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