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Simplifying 2(5 + -1x) + 3 = (-15) + -2x (5 * 2 + -1x * 2) + 3 = (-15) + -2x (10 + -2x) + 3 = (-15) + -2x Reorder the terms: 10 + 3 + -2x = (-15) + -2x Combine like terms: 10 + 3 = 13 13 + -2x = (-15) + -2x 13 + -2x = -15 + -2x Add '2x' to each side of the equation. 13 + -2x + 2x = -15 + -2x + 2x Combine like terms: -2x + 2x = 0 13 + 0 = -15 + -2x + 2x 13 = -15 + -2x + 2x Combine like terms: -2x + 2x = 0 13 = -15 + 0 13 = -15 Solving 13 = -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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