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Simplifying 21x + -5 + -15x + 2 = 19x + -7 + -13x + 16 Reorder the terms: -5 + 2 + 21x + -15x = 19x + -7 + -13x + 16 Combine like terms: -5 + 2 = -3 -3 + 21x + -15x = 19x + -7 + -13x + 16 Combine like terms: 21x + -15x = 6x -3 + 6x = 19x + -7 + -13x + 16 Reorder the terms: -3 + 6x = -7 + 16 + 19x + -13x Combine like terms: -7 + 16 = 9 -3 + 6x = 9 + 19x + -13x Combine like terms: 19x + -13x = 6x -3 + 6x = 9 + 6x Add '-6x' to each side of the equation. -3 + 6x + -6x = 9 + 6x + -6x Combine like terms: 6x + -6x = 0 -3 + 0 = 9 + 6x + -6x -3 = 9 + 6x + -6x Combine like terms: 6x + -6x = 0 -3 = 9 + 0 -3 = 9 Solving -3 = 9 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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