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Simplifying (Q + -30) + 45 = 100 Reorder the terms: (-30 + Q) + 45 = 100 Remove parenthesis around (-30 + Q) -30 + Q + 45 = 100 Reorder the terms: -30 + 45 + Q = 100 Combine like terms: -30 + 45 = 15 15 + Q = 100 Solving 15 + Q = 100 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + Q = 100 + -15 Combine like terms: 15 + -15 = 0 0 + Q = 100 + -15 Q = 100 + -15 Combine like terms: 100 + -15 = 85 Q = 85 Simplifying Q = 85
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