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Simplifying 7x + 5y = 5y + 7x Reorder the terms: 7x + 5y = 7x + 5y Add '-7x' to each side of the equation. 7x + -7x + 5y = 7x + -7x + 5y Combine like terms: 7x + -7x = 0 0 + 5y = 7x + -7x + 5y 5y = 7x + -7x + 5y Combine like terms: 7x + -7x = 0 5y = 0 + 5y 5y = 5y Add '-5y' to each side of the equation. 5y + -5y = 5y + -5y Combine like terms: 5y + -5y = 0 0 = 5y + -5y Combine like terms: 5y + -5y = 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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