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Simplifying -3(u + 1) + 7u = 4(u + 1) Reorder the terms: -3(1 + u) + 7u = 4(u + 1) (1 * -3 + u * -3) + 7u = 4(u + 1) (-3 + -3u) + 7u = 4(u + 1) Combine like terms: -3u + 7u = 4u -3 + 4u = 4(u + 1) Reorder the terms: -3 + 4u = 4(1 + u) -3 + 4u = (1 * 4 + u * 4) -3 + 4u = (4 + 4u) Add '-4u' to each side of the equation. -3 + 4u + -4u = 4 + 4u + -4u Combine like terms: 4u + -4u = 0 -3 + 0 = 4 + 4u + -4u -3 = 4 + 4u + -4u Combine like terms: 4u + -4u = 0 -3 = 4 + 0 -3 = 4 Solving -3 = 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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