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Simplifying 8x + 21 + -1x = 7x + 3 Reorder the terms: 21 + 8x + -1x = 7x + 3 Combine like terms: 8x + -1x = 7x 21 + 7x = 7x + 3 Reorder the terms: 21 + 7x = 3 + 7x Add '-7x' to each side of the equation. 21 + 7x + -7x = 3 + 7x + -7x Combine like terms: 7x + -7x = 0 21 + 0 = 3 + 7x + -7x 21 = 3 + 7x + -7x Combine like terms: 7x + -7x = 0 21 = 3 + 0 21 = 3 Solving 21 = 3 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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