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Simplifying 4(2x + -5) = x + 20 + 7x Reorder the terms: 4(-5 + 2x) = x + 20 + 7x (-5 * 4 + 2x * 4) = x + 20 + 7x (-20 + 8x) = x + 20 + 7x Reorder the terms: -20 + 8x = 20 + x + 7x Combine like terms: x + 7x = 8x -20 + 8x = 20 + 8x Add '-8x' to each side of the equation. -20 + 8x + -8x = 20 + 8x + -8x Combine like terms: 8x + -8x = 0 -20 + 0 = 20 + 8x + -8x -20 = 20 + 8x + -8x Combine like terms: 8x + -8x = 0 -20 = 20 + 0 -20 = 20 Solving -20 = 20 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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