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Simplifying 3x + -1(2x + -5) + 8 = 9x + -4(2x + 7) Reorder the terms: 3x + -1(-5 + 2x) + 8 = 9x + -4(2x + 7) 3x + (-5 * -1 + 2x * -1) + 8 = 9x + -4(2x + 7) 3x + (5 + -2x) + 8 = 9x + -4(2x + 7) Reorder the terms: 5 + 8 + 3x + -2x = 9x + -4(2x + 7) Combine like terms: 5 + 8 = 13 13 + 3x + -2x = 9x + -4(2x + 7) Combine like terms: 3x + -2x = 1x 13 + 1x = 9x + -4(2x + 7) Reorder the terms: 13 + 1x = 9x + -4(7 + 2x) 13 + 1x = 9x + (7 * -4 + 2x * -4) 13 + 1x = 9x + (-28 + -8x) Reorder the terms: 13 + 1x = -28 + 9x + -8x Combine like terms: 9x + -8x = 1x 13 + 1x = -28 + 1x Add '-1x' to each side of the equation. 13 + 1x + -1x = -28 + 1x + -1x Combine like terms: 1x + -1x = 0 13 + 0 = -28 + 1x + -1x 13 = -28 + 1x + -1x Combine like terms: 1x + -1x = 0 13 = -28 + 0 13 = -28 Solving 13 = -28 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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