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Simplifying (Q + -7) * 3 = 30 Reorder the terms: (-7 + Q) * 3 = 30 Reorder the terms for easier multiplication: 3(-7 + Q) = 30 (-7 * 3 + Q * 3) = 30 (-21 + 3Q) = 30 Solving -21 + 3Q = 30 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 3Q = 30 + 21 Combine like terms: -21 + 21 = 0 0 + 3Q = 30 + 21 3Q = 30 + 21 Combine like terms: 30 + 21 = 51 3Q = 51 Divide each side by '3'. Q = 17 Simplifying Q = 17
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