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Simplifying -2x + 3 + -4x = -6x + 21 Reorder the terms: 3 + -2x + -4x = -6x + 21 Combine like terms: -2x + -4x = -6x 3 + -6x = -6x + 21 Reorder the terms: 3 + -6x = 21 + -6x Add '6x' to each side of the equation. 3 + -6x + 6x = 21 + -6x + 6x Combine like terms: -6x + 6x = 0 3 + 0 = 21 + -6x + 6x 3 = 21 + -6x + 6x Combine like terms: -6x + 6x = 0 3 = 21 + 0 3 = 21 Solving 3 = 21 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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