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Simplifying 4(u + -3) + -7u = -30 Reorder the terms: 4(-3 + u) + -7u = -30 (-3 * 4 + u * 4) + -7u = -30 (-12 + 4u) + -7u = -30 Combine like terms: 4u + -7u = -3u -12 + -3u = -30 Solving -12 + -3u = -30 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 = -30 + 12 Combine like terms: -12 + 12 = 0 0 + -3u = -30 + 12 -3u = -30 + 12 Combine like terms: -30 + 12 = -18 -3u = -18 Divide each side by '-3'. u = 6 Simplifying u = 6
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