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Simplifying 4(3 + -1u) + u = 22 + 20 (3 * 4 + -1u * 4) + u = 22 + 20 (12 + -4u) + u = 22 + 20 Combine like terms: -4u + u = -3u 12 + -3u = 22 + 20 Combine like terms: 22 + 20 = 42 12 + -3u = 42 Solving 12 + -3u = 42 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -3u = 42 + -12 Combine like terms: 12 + -12 = 0 0 + -3u = 42 + -12 -3u = 42 + -12 Combine like terms: 42 + -12 = 30 -3u = 30 Divide each side by '-3'. u = -10 Simplifying u = -10
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