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Simplifying 9 + -1(x + 18) = -1x + -7 Reorder the terms: 9 + -1(18 + x) = -1x + -7 9 + (18 * -1 + x * -1) = -1x + -7 9 + (-18 + -1x) = -1x + -7 Combine like terms: 9 + -18 = -9 -9 + -1x = -1x + -7 Reorder the terms: -9 + -1x = -7 + -1x Add 'x' to each side of the equation. -9 + -1x + x = -7 + -1x + x Combine like terms: -1x + x = 0 -9 + 0 = -7 + -1x + x -9 = -7 + -1x + x Combine like terms: -1x + x = 0 -9 = -7 + 0 -9 = -7 Solving -9 = -7 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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