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

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