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Simplifying 3x + -1(9x + 7) = 15 + -6x Reorder the terms: 3x + -1(7 + 9x) = 15 + -6x 3x + (7 * -1 + 9x * -1) = 15 + -6x 3x + (-7 + -9x) = 15 + -6x Reorder the terms: -7 + 3x + -9x = 15 + -6x Combine like terms: 3x + -9x = -6x -7 + -6x = 15 + -6x Add '6x' to each side of the equation. -7 + -6x + 6x = 15 + -6x + 6x Combine like terms: -6x + 6x = 0 -7 + 0 = 15 + -6x + 6x -7 = 15 + -6x + 6x Combine like terms: -6x + 6x = 0 -7 = 15 + 0 -7 = 15 Solving -7 = 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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