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Simplifying 4x + -7x + -9 = -3x + 7 + -9 Reorder the terms: -9 + 4x + -7x = -3x + 7 + -9 Combine like terms: 4x + -7x = -3x -9 + -3x = -3x + 7 + -9 Reorder the terms: -9 + -3x = 7 + -9 + -3x Combine like terms: 7 + -9 = -2 -9 + -3x = -2 + -3x Add '3x' to each side of the equation. -9 + -3x + 3x = -2 + -3x + 3x Combine like terms: -3x + 3x = 0 -9 + 0 = -2 + -3x + 3x -9 = -2 + -3x + 3x Combine like terms: -3x + 3x = 0 -9 = -2 + 0 -9 = -2 Solving -9 = -2 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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