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Simplifying (7x + 12) + (5x + -30) = 180 Reorder the terms: (12 + 7x) + (5x + -30) = 180 Remove parenthesis around (12 + 7x) 12 + 7x + (5x + -30) = 180 Reorder the terms: 12 + 7x + (-30 + 5x) = 180 Remove parenthesis around (-30 + 5x) 12 + 7x + -30 + 5x = 180 Reorder the terms: 12 + -30 + 7x + 5x = 180 Combine like terms: 12 + -30 = -18 -18 + 7x + 5x = 180 Combine like terms: 7x + 5x = 12x -18 + 12x = 180 Solving -18 + 12x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 12x = 180 + 18 Combine like terms: -18 + 18 = 0 0 + 12x = 180 + 18 12x = 180 + 18 Combine like terms: 180 + 18 = 198 12x = 198 Divide each side by '12'. x = 16.5 Simplifying x = 16.5
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