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Simplifying 2x + -5(4 + -1x) = 7x 2x + (4 * -5 + -1x * -5) = 7x 2x + (-20 + 5x) = 7x Reorder the terms: -20 + 2x + 5x = 7x Combine like terms: 2x + 5x = 7x -20 + 7x = 7x Add '-7x' to each side of the equation. -20 + 7x + -7x = 7x + -7x Combine like terms: 7x + -7x = 0 -20 + 0 = 7x + -7x -20 = 7x + -7x Combine like terms: 7x + -7x = 0 -20 = 0 Solving -20 = 0 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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