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Simplifying 84 = 0.5 * 21x Multiply 0.5 * 21 84 = 10.5x Solving 84 = 10.5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10.5x' to each side of the equation. 84 + -10.5x = 10.5x + -10.5x Combine like terms: 10.5x + -10.5x = 0.0 84 + -10.5x = 0.0 Add '-84' to each side of the equation. 84 + -84 + -10.5x = 0.0 + -84 Combine like terms: 84 + -84 = 0 0 + -10.5x = 0.0 + -84 -10.5x = 0.0 + -84 Combine like terms: 0.0 + -84 = -84 -10.5x = -84 Divide each side by '-10.5'. x = 8 Simplifying x = 8
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