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Simplifying 20(v + 4) + -4v = 4(4v + 1) + -9 Reorder the terms: 20(4 + v) + -4v = 4(4v + 1) + -9 (4 * 20 + v * 20) + -4v = 4(4v + 1) + -9 (80 + 20v) + -4v = 4(4v + 1) + -9 Combine like terms: 20v + -4v = 16v 80 + 16v = 4(4v + 1) + -9 Reorder the terms: 80 + 16v = 4(1 + 4v) + -9 80 + 16v = (1 * 4 + 4v * 4) + -9 80 + 16v = (4 + 16v) + -9 Reorder the terms: 80 + 16v = 4 + -9 + 16v Combine like terms: 4 + -9 = -5 80 + 16v = -5 + 16v Add '-16v' to each side of the equation. 80 + 16v + -16v = -5 + 16v + -16v Combine like terms: 16v + -16v = 0 80 + 0 = -5 + 16v + -16v 80 = -5 + 16v + -16v Combine like terms: 16v + -16v = 0 80 = -5 + 0 80 = -5 Solving 80 = -5 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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