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Simplifying -4x + 6x + -9 = 2(x + -4) + -21 Reorder the terms: -9 + -4x + 6x = 2(x + -4) + -21 Combine like terms: -4x + 6x = 2x -9 + 2x = 2(x + -4) + -21 Reorder the terms: -9 + 2x = 2(-4 + x) + -21 -9 + 2x = (-4 * 2 + x * 2) + -21 -9 + 2x = (-8 + 2x) + -21 Reorder the terms: -9 + 2x = -8 + -21 + 2x Combine like terms: -8 + -21 = -29 -9 + 2x = -29 + 2x Add '-2x' to each side of the equation. -9 + 2x + -2x = -29 + 2x + -2x Combine like terms: 2x + -2x = 0 -9 + 0 = -29 + 2x + -2x -9 = -29 + 2x + -2x Combine like terms: 2x + -2x = 0 -9 = -29 + 0 -9 = -29 Solving -9 = -29 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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