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Simplifying 9 + -2(2x + 5) + 4x + -12 = 0 Reorder the terms: 9 + -2(5 + 2x) + 4x + -12 = 0 9 + (5 * -2 + 2x * -2) + 4x + -12 = 0 9 + (-10 + -4x) + 4x + -12 = 0 Reorder the terms: 9 + -10 + -12 + -4x + 4x = 0 Combine like terms: 9 + -10 = -1 -1 + -12 + -4x + 4x = 0 Combine like terms: -1 + -12 = -13 -13 + -4x + 4x = 0 Combine like terms: -4x + 4x = 0 -13 + 0 = 0 -13 = 0 Solving -13 = 0 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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