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Simplifying -7 + 2x + -1(2 + 4x) = 5 + -2x + 3 -7 + 2x + (2 * -1 + 4x * -1) = 5 + -2x + 3 -7 + 2x + (-2 + -4x) = 5 + -2x + 3 Reorder the terms: -7 + -2 + 2x + -4x = 5 + -2x + 3 Combine like terms: -7 + -2 = -9 -9 + 2x + -4x = 5 + -2x + 3 Combine like terms: 2x + -4x = -2x -9 + -2x = 5 + -2x + 3 Reorder the terms: -9 + -2x = 5 + 3 + -2x Combine like terms: 5 + 3 = 8 -9 + -2x = 8 + -2x Add '2x' to each side of the equation. -9 + -2x + 2x = 8 + -2x + 2x Combine like terms: -2x + 2x = 0 -9 + 0 = 8 + -2x + 2x -9 = 8 + -2x + 2x Combine like terms: -2x + 2x = 0 -9 = 8 + 0 -9 = 8 Solving -9 = 8 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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