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Simplifying 4x + -1(2x + 1) = 2x + -1 Reorder the terms: 4x + -1(1 + 2x) = 2x + -1 4x + (1 * -1 + 2x * -1) = 2x + -1 4x + (-1 + -2x) = 2x + -1 Reorder the terms: -1 + 4x + -2x = 2x + -1 Combine like terms: 4x + -2x = 2x -1 + 2x = 2x + -1 Reorder the terms: -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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