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Simplifying 8x + -16(x + 1) = -8x + 21 Reorder the terms: 8x + -16(1 + x) = -8x + 21 8x + (1 * -16 + x * -16) = -8x + 21 8x + (-16 + -16x) = -8x + 21 Reorder the terms: -16 + 8x + -16x = -8x + 21 Combine like terms: 8x + -16x = -8x -16 + -8x = -8x + 21 Reorder the terms: -16 + -8x = 21 + -8x Add '8x' to each side of the equation. -16 + -8x + 8x = 21 + -8x + 8x Combine like terms: -8x + 8x = 0 -16 + 0 = 21 + -8x + 8x -16 = 21 + -8x + 8x Combine like terms: -8x + 8x = 0 -16 = 21 + 0 -16 = 21 Solving -16 = 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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