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Simplifying 0.5x + 21 = 3(2x) Reorder the terms: 21 + 0.5x = 3(2x) Remove parenthesis around (2x) 21 + 0.5x = 3 * 2x Multiply 3 * 2 21 + 0.5x = 6x Solving 21 + 0.5x = 6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6x' to each side of the equation. 21 + 0.5x + -6x = 6x + -6x Combine like terms: 0.5x + -6x = -5.5x 21 + -5.5x = 6x + -6x Combine like terms: 6x + -6x = 0 21 + -5.5x = 0 Add '-21' to each side of the equation. 21 + -21 + -5.5x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -5.5x = 0 + -21 -5.5x = 0 + -21 Combine like terms: 0 + -21 = -21 -5.5x = -21 Divide each side by '-5.5'. x = 3.818181818 Simplifying x = 3.818181818
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