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