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