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Simplifying 9(4x + -5) = 3(12x + 7) Reorder the terms: 9(-5 + 4x) = 3(12x + 7) (-5 * 9 + 4x * 9) = 3(12x + 7) (-45 + 36x) = 3(12x + 7) Reorder the terms: -45 + 36x = 3(7 + 12x) -45 + 36x = (7 * 3 + 12x * 3) -45 + 36x = (21 + 36x) Add '-36x' to each side of the equation. -45 + 36x + -36x = 21 + 36x + -36x Combine like terms: 36x + -36x = 0 -45 + 0 = 21 + 36x + -36x -45 = 21 + 36x + -36x Combine like terms: 36x + -36x = 0 -45 = 21 + 0 -45 = 21 Solving -45 = 21 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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