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