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Simplifying 15 + 9(x + -2) = 13x + -4(x + 4) Reorder the terms: 15 + 9(-2 + x) = 13x + -4(x + 4) 15 + (-2 * 9 + x * 9) = 13x + -4(x + 4) 15 + (-18 + 9x) = 13x + -4(x + 4) Combine like terms: 15 + -18 = -3 -3 + 9x = 13x + -4(x + 4) Reorder the terms: -3 + 9x = 13x + -4(4 + x) -3 + 9x = 13x + (4 * -4 + x * -4) -3 + 9x = 13x + (-16 + -4x) Reorder the terms: -3 + 9x = -16 + 13x + -4x Combine like terms: 13x + -4x = 9x -3 + 9x = -16 + 9x Add '-9x' to each side of the equation. -3 + 9x + -9x = -16 + 9x + -9x Combine like terms: 9x + -9x = 0 -3 + 0 = -16 + 9x + -9x -3 = -16 + 9x + -9x Combine like terms: 9x + -9x = 0 -3 = -16 + 0 -3 = -16 Solving -3 = -16 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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