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Simplifying 2.8x + 21 = 2.2x + 18 Reorder the terms: 21 + 2.8x = 2.2x + 18 Reorder the terms: 21 + 2.8x = 18 + 2.2x Solving 21 + 2.8x = 18 + 2.2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.2x' to each side of the equation. 21 + 2.8x + -2.2x = 18 + 2.2x + -2.2x Combine like terms: 2.8x + -2.2x = 0.6x 21 + 0.6x = 18 + 2.2x + -2.2x Combine like terms: 2.2x + -2.2x = 0.0 21 + 0.6x = 18 + 0.0 21 + 0.6x = 18 Add '-21' to each side of the equation. 21 + -21 + 0.6x = 18 + -21 Combine like terms: 21 + -21 = 0 0 + 0.6x = 18 + -21 0.6x = 18 + -21 Combine like terms: 18 + -21 = -3 0.6x = -3 Divide each side by '0.6'. x = -5 Simplifying x = -5
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