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Simplifying 28 + -1x = 7 Solving 28 + -1x = 7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + -1x = 7 + -28 Combine like terms: 28 + -28 = 0 0 + -1x = 7 + -28 -1x = 7 + -28 Combine like terms: 7 + -28 = -21 -1x = -21 Divide each side by '-1'. x = 21 Simplifying x = 21
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