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Simplifying 4.2 = 1.05 + U Solving 4.2 = 1.05 + U Solving for variable 'U'. Move all terms containing U to the left, all other terms to the right. Add '-1U' to each side of the equation. 4.2 + -1U = 1.05 + U + -1U Combine like terms: U + -1U = 0 4.2 + -1U = 1.05 + 0 4.2 + -1U = 1.05 Add '-4.2' to each side of the equation. 4.2 + -4.2 + -1U = 1.05 + -4.2 Combine like terms: 4.2 + -4.2 = 0.0 0.0 + -1U = 1.05 + -4.2 -1U = 1.05 + -4.2 Combine like terms: 1.05 + -4.2 = -3.15 -1U = -3.15 Divide each side by '-1'. U = 3.15 Simplifying U = 3.15
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