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