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Simplifying 12x + -1(5x + 2) = 7x + -2 Reorder the terms: 12x + -1(2 + 5x) = 7x + -2 12x + (2 * -1 + 5x * -1) = 7x + -2 12x + (-2 + -5x) = 7x + -2 Reorder the terms: -2 + 12x + -5x = 7x + -2 Combine like terms: 12x + -5x = 7x -2 + 7x = 7x + -2 Reorder the terms: -2 + 7x = -2 + 7x Add '2' to each side of the equation. -2 + 2 + 7x = -2 + 2 + 7x Combine like terms: -2 + 2 = 0 0 + 7x = -2 + 2 + 7x 7x = -2 + 2 + 7x Combine like terms: -2 + 2 = 0 7x = 0 + 7x 7x = 7x Add '-7x' to each side of the equation. 7x + -7x = 7x + -7x Combine like terms: 7x + -7x = 0 0 = 7x + -7x Combine like terms: 7x + -7x = 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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