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Simplifying 56 = 4u + 3u Combine like terms: 4u + 3u = 7u 56 = 7u Solving 56 = 7u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-7u' to each side of the equation. 56 + -7u = 7u + -7u Combine like terms: 7u + -7u = 0 56 + -7u = 0 Add '-56' to each side of the equation. 56 + -56 + -7u = 0 + -56 Combine like terms: 56 + -56 = 0 0 + -7u = 0 + -56 -7u = 0 + -56 Combine like terms: 0 + -56 = -56 -7u = -56 Divide each side by '-7'. u = 8 Simplifying u = 8
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