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Simplifying 21 + 0.99x = 1.29x Solving 21 + 0.99x = 1.29x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.29x' to each side of the equation. 21 + 0.99x + -1.29x = 1.29x + -1.29x Combine like terms: 0.99x + -1.29x = -0.3x 21 + -0.3x = 1.29x + -1.29x Combine like terms: 1.29x + -1.29x = 0.00 21 + -0.3x = 0.00 Add '-21' to each side of the equation. 21 + -21 + -0.3x = 0.00 + -21 Combine like terms: 21 + -21 = 0 0 + -0.3x = 0.00 + -21 -0.3x = 0.00 + -21 Combine like terms: 0.00 + -21 = -21 -0.3x = -21 Divide each side by '-0.3'. x = 70 Simplifying x = 70
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