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Simplifying 9(x + -3) + 7 = 4x + 5(-3 + x) Reorder the terms: 9(-3 + x) + 7 = 4x + 5(-3 + x) (-3 * 9 + x * 9) + 7 = 4x + 5(-3 + x) (-27 + 9x) + 7 = 4x + 5(-3 + x) Reorder the terms: -27 + 7 + 9x = 4x + 5(-3 + x) Combine like terms: -27 + 7 = -20 -20 + 9x = 4x + 5(-3 + x) -20 + 9x = 4x + (-3 * 5 + x * 5) -20 + 9x = 4x + (-15 + 5x) Reorder the terms: -20 + 9x = -15 + 4x + 5x Combine like terms: 4x + 5x = 9x -20 + 9x = -15 + 9x Add '-9x' to each side of the equation. -20 + 9x + -9x = -15 + 9x + -9x Combine like terms: 9x + -9x = 0 -20 + 0 = -15 + 9x + -9x -20 = -15 + 9x + -9x Combine like terms: 9x + -9x = 0 -20 = -15 + 0 -20 = -15 Solving -20 = -15 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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