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Simplifying 72 + 4u = 12u Solving 72 + 4u = 12u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-12u' to each side of the equation. 72 + 4u + -12u = 12u + -12u Combine like terms: 4u + -12u = -8u 72 + -8u = 12u + -12u Combine like terms: 12u + -12u = 0 72 + -8u = 0 Add '-72' to each side of the equation. 72 + -72 + -8u = 0 + -72 Combine like terms: 72 + -72 = 0 0 + -8u = 0 + -72 -8u = 0 + -72 Combine like terms: 0 + -72 = -72 -8u = -72 Divide each side by '-8'. u = 9 Simplifying u = 9
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