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Simplifying 4(2x + 3) = 9x + -15 + -1x Reorder the terms: 4(3 + 2x) = 9x + -15 + -1x (3 * 4 + 2x * 4) = 9x + -15 + -1x (12 + 8x) = 9x + -15 + -1x Reorder the terms: 12 + 8x = -15 + 9x + -1x Combine like terms: 9x + -1x = 8x 12 + 8x = -15 + 8x Add '-8x' to each side of the equation. 12 + 8x + -8x = -15 + 8x + -8x Combine like terms: 8x + -8x = 0 12 + 0 = -15 + 8x + -8x 12 = -15 + 8x + -8x Combine like terms: 8x + -8x = 0 12 = -15 + 0 12 = -15 Solving 12 = -15 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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