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Simplifying 4x + (5x + -9) = 9(x + -7) Reorder the terms: 4x + (-9 + 5x) = 9(x + -7) Remove parenthesis around (-9 + 5x) 4x + -9 + 5x = 9(x + -7) Reorder the terms: -9 + 4x + 5x = 9(x + -7) Combine like terms: 4x + 5x = 9x -9 + 9x = 9(x + -7) Reorder the terms: -9 + 9x = 9(-7 + x) -9 + 9x = (-7 * 9 + x * 9) -9 + 9x = (-63 + 9x) Add '-9x' to each side of the equation. -9 + 9x + -9x = -63 + 9x + -9x Combine like terms: 9x + -9x = 0 -9 + 0 = -63 + 9x + -9x -9 = -63 + 9x + -9x Combine like terms: 9x + -9x = 0 -9 = -63 + 0 -9 = -63 Solving -9 = -63 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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