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Simplifying 21 + -8x = 12x + -18 Reorder the terms: 21 + -8x = -18 + 12x Solving 21 + -8x = -18 + 12x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12x' to each side of the equation. 21 + -8x + -12x = -18 + 12x + -12x Combine like terms: -8x + -12x = -20x 21 + -20x = -18 + 12x + -12x Combine like terms: 12x + -12x = 0 21 + -20x = -18 + 0 21 + -20x = -18 Add '-21' to each side of the equation. 21 + -21 + -20x = -18 + -21 Combine like terms: 21 + -21 = 0 0 + -20x = -18 + -21 -20x = -18 + -21 Combine like terms: -18 + -21 = -39 -20x = -39 Divide each side by '-20'. x = 1.95 Simplifying x = 1.95
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