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Simplifying (2x + 8) + (x + 3) = 42 Reorder the terms: (8 + 2x) + (x + 3) = 42 Remove parenthesis around (8 + 2x) 8 + 2x + (x + 3) = 42 Reorder the terms: 8 + 2x + (3 + x) = 42 Remove parenthesis around (3 + x) 8 + 2x + 3 + x = 42 Reorder the terms: 8 + 3 + 2x + x = 42 Combine like terms: 8 + 3 = 11 11 + 2x + x = 42 Combine like terms: 2x + x = 3x 11 + 3x = 42 Solving 11 + 3x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + 3x = 42 + -11 Combine like terms: 11 + -11 = 0 0 + 3x = 42 + -11 3x = 42 + -11 Combine like terms: 42 + -11 = 31 3x = 31 Divide each side by '3'. x = 10.33333333 Simplifying x = 10.33333333
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