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Simplifying 2A + (A + 42) = 180 Reorder the terms: 2A + (42 + A) = 180 Remove parenthesis around (42 + A) 2A + 42 + A = 180 Reorder the terms: 42 + 2A + A = 180 Combine like terms: 2A + A = 3A 42 + 3A = 180 Solving 42 + 3A = 180 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 3A = 180 + -42 Combine like terms: 42 + -42 = 0 0 + 3A = 180 + -42 3A = 180 + -42 Combine like terms: 180 + -42 = 138 3A = 138 Divide each side by '3'. A = 46 Simplifying A = 46
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