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Simplifying -3(4x + -1) + 4 = -12x + 7 Reorder the terms: -3(-1 + 4x) + 4 = -12x + 7 (-1 * -3 + 4x * -3) + 4 = -12x + 7 (3 + -12x) + 4 = -12x + 7 Reorder the terms: 3 + 4 + -12x = -12x + 7 Combine like terms: 3 + 4 = 7 7 + -12x = -12x + 7 Reorder the terms: 7 + -12x = 7 + -12x Add '-7' to each side of the equation. 7 + -7 + -12x = 7 + -7 + -12x Combine like terms: 7 + -7 = 0 0 + -12x = 7 + -7 + -12x -12x = 7 + -7 + -12x Combine like terms: 7 + -7 = 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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