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Simplifying 2(x + 8) + 5 = 2x + 4 Reorder the terms: 2(8 + x) + 5 = 2x + 4 (8 * 2 + x * 2) + 5 = 2x + 4 (16 + 2x) + 5 = 2x + 4 Reorder the terms: 16 + 5 + 2x = 2x + 4 Combine like terms: 16 + 5 = 21 21 + 2x = 2x + 4 Reorder the terms: 21 + 2x = 4 + 2x Add '-2x' to each side of the equation. 21 + 2x + -2x = 4 + 2x + -2x Combine like terms: 2x + -2x = 0 21 + 0 = 4 + 2x + -2x 21 = 4 + 2x + -2x Combine like terms: 2x + -2x = 0 21 = 4 + 0 21 = 4 Solving 21 = 4 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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