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Simplifying 12 + 7(2x + -1) = 14x + -9 Reorder the terms: 12 + 7(-1 + 2x) = 14x + -9 12 + (-1 * 7 + 2x * 7) = 14x + -9 12 + (-7 + 14x) = 14x + -9 Combine like terms: 12 + -7 = 5 5 + 14x = 14x + -9 Reorder the terms: 5 + 14x = -9 + 14x Add '-14x' to each side of the equation. 5 + 14x + -14x = -9 + 14x + -14x Combine like terms: 14x + -14x = 0 5 + 0 = -9 + 14x + -14x 5 = -9 + 14x + -14x Combine like terms: 14x + -14x = 0 5 = -9 + 0 5 = -9 Solving 5 = -9 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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