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Simplifying 7 * 3 + -5x + 2 = 25 + 2x + -7x + -2 Multiply 7 * 3 21 + -5x + 2 = 25 + 2x + -7x + -2 Reorder the terms: 21 + 2 + -5x = 25 + 2x + -7x + -2 Combine like terms: 21 + 2 = 23 23 + -5x = 25 + 2x + -7x + -2 Reorder the terms: 23 + -5x = 25 + -2 + 2x + -7x Combine like terms: 25 + -2 = 23 23 + -5x = 23 + 2x + -7x Combine like terms: 2x + -7x = -5x 23 + -5x = 23 + -5x Add '-23' to each side of the equation. 23 + -23 + -5x = 23 + -23 + -5x Combine like terms: 23 + -23 = 0 0 + -5x = 23 + -23 + -5x -5x = 23 + -23 + -5x Combine like terms: 23 + -23 = 0 -5x = 0 + -5x -5x = -5x Add '5x' to each side of the equation. -5x + 5x = -5x + 5x Combine like terms: -5x + 5x = 0 0 = -5x + 5x Combine like terms: -5x + 5x = 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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