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Simplifying 28 = 2.2x + -21 Reorder the terms: 28 = -21 + 2.2x Solving 28 = -21 + 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. 28 + -2.2x = -21 + 2.2x + -2.2x Combine like terms: 2.2x + -2.2x = 0.0 28 + -2.2x = -21 + 0.0 28 + -2.2x = -21 Add '-28' to each side of the equation. 28 + -28 + -2.2x = -21 + -28 Combine like terms: 28 + -28 = 0 0 + -2.2x = -21 + -28 -2.2x = -21 + -28 Combine like terms: -21 + -28 = -49 -2.2x = -49 Divide each side by '-2.2'. x = 22.27272727 Simplifying x = 22.27272727
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