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