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Simplifying 21x + -5 + -16x + 3 = 21x + -9 + -16x + 11 Reorder the terms: -5 + 3 + 21x + -16x = 21x + -9 + -16x + 11 Combine like terms: -5 + 3 = -2 -2 + 21x + -16x = 21x + -9 + -16x + 11 Combine like terms: 21x + -16x = 5x -2 + 5x = 21x + -9 + -16x + 11 Reorder the terms: -2 + 5x = -9 + 11 + 21x + -16x Combine like terms: -9 + 11 = 2 -2 + 5x = 2 + 21x + -16x Combine like terms: 21x + -16x = 5x -2 + 5x = 2 + 5x Add '-5x' to each side of the equation. -2 + 5x + -5x = 2 + 5x + -5x Combine like terms: 5x + -5x = 0 -2 + 0 = 2 + 5x + -5x -2 = 2 + 5x + -5x Combine like terms: 5x + -5x = 0 -2 = 2 + 0 -2 = 2 Solving -2 = 2 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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