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Simplifying (x + 20) + (x + 25) = (3x + 20) Reorder the terms: (20 + x) + (x + 25) = (3x + 20) Remove parenthesis around (20 + x) 20 + x + (x + 25) = (3x + 20) Reorder the terms: 20 + x + (25 + x) = (3x + 20) Remove parenthesis around (25 + x) 20 + x + 25 + x = (3x + 20) Reorder the terms: 20 + 25 + x + x = (3x + 20) Combine like terms: 20 + 25 = 45 45 + x + x = (3x + 20) Combine like terms: x + x = 2x 45 + 2x = (3x + 20) Reorder the terms: 45 + 2x = (20 + 3x) Remove parenthesis around (20 + 3x) 45 + 2x = 20 + 3x Solving 45 + 2x = 20 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 45 + 2x + -3x = 20 + 3x + -3x Combine like terms: 2x + -3x = -1x 45 + -1x = 20 + 3x + -3x Combine like terms: 3x + -3x = 0 45 + -1x = 20 + 0 45 + -1x = 20 Add '-45' to each side of the equation. 45 + -45 + -1x = 20 + -45 Combine like terms: 45 + -45 = 0 0 + -1x = 20 + -45 -1x = 20 + -45 Combine like terms: 20 + -45 = -25 -1x = -25 Divide each side by '-1'. x = 25 Simplifying x = 25
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