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Simplifying -3 + 5x + 4 + -7x = 2x + -4x + 1 Reorder the terms: -3 + 4 + 5x + -7x = 2x + -4x + 1 Combine like terms: -3 + 4 = 1 1 + 5x + -7x = 2x + -4x + 1 Combine like terms: 5x + -7x = -2x 1 + -2x = 2x + -4x + 1 Reorder the terms: 1 + -2x = 1 + 2x + -4x Combine like terms: 2x + -4x = -2x 1 + -2x = 1 + -2x Add '-1' to each side of the equation. 1 + -1 + -2x = 1 + -1 + -2x Combine like terms: 1 + -1 = 0 0 + -2x = 1 + -1 + -2x -2x = 1 + -1 + -2x Combine like terms: 1 + -1 = 0 -2x = 0 + -2x -2x = -2x Add '2x' to each side of the equation. -2x + 2x = -2x + 2x Combine like terms: -2x + 2x = 0 0 = -2x + 2x Combine like terms: -2x + 2x = 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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