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Simplifying -4x + 12 = 3 + -4(x + -3) Reorder the terms: 12 + -4x = 3 + -4(x + -3) Reorder the terms: 12 + -4x = 3 + -4(-3 + x) 12 + -4x = 3 + (-3 * -4 + x * -4) 12 + -4x = 3 + (12 + -4x) Combine like terms: 3 + 12 = 15 12 + -4x = 15 + -4x Add '4x' to each side of the equation. 12 + -4x + 4x = 15 + -4x + 4x Combine like terms: -4x + 4x = 0 12 + 0 = 15 + -4x + 4x 12 = 15 + -4x + 4x Combine like terms: -4x + 4x = 0 12 = 15 + 0 12 = 15 Solving 12 = 15 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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