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Simplifying x + 7.5 = 7.5 + x Reorder the terms: 7.5 + x = 7.5 + x Add '-7.5' to each side of the equation. 7.5 + -7.5 + x = 7.5 + -7.5 + x Combine like terms: 7.5 + -7.5 = 0.0 0.0 + x = 7.5 + -7.5 + x x = 7.5 + -7.5 + x Combine like terms: 7.5 + -7.5 = 0.0 x = 0.0 + x x = x Add '-1x' to each side of the equation. x + -1x = x + -1x Combine like terms: x + -1x = 0 0 = x + -1x Combine like terms: x + -1x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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