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Simplifying x + 7 = x + 3 + 4 Reorder the terms: 7 + x = x + 3 + 4 Reorder the terms: 7 + x = 3 + 4 + x Combine like terms: 3 + 4 = 7 7 + x = 7 + x Add '-7' to each side of the equation. 7 + -7 + x = 7 + -7 + x Combine like terms: 7 + -7 = 0 0 + x = 7 + -7 + x x = 7 + -7 + x Combine like terms: 7 + -7 = 0 x = 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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