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Simplifying -7u + 12 = -4u Reorder the terms: 12 + -7u = -4u Solving 12 + -7u = -4u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '4u' to each side of the equation. 12 + -7u + 4u = -4u + 4u Combine like terms: -7u + 4u = -3u 12 + -3u = -4u + 4u Combine like terms: -4u + 4u = 0 12 + -3u = 0 Add '-12' to each side of the equation. 12 + -12 + -3u = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -3u = 0 + -12 -3u = 0 + -12 Combine like terms: 0 + -12 = -12 -3u = -12 Divide each side by '-3'. u = 4 Simplifying u = 4
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