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Simplifying 121 = 25 + 2x + (x + 21) Reorder the terms: 121 = 25 + 2x + (21 + x) Remove parenthesis around (21 + x) 121 = 25 + 2x + 21 + x Reorder the terms: 121 = 25 + 21 + 2x + x Combine like terms: 25 + 21 = 46 121 = 46 + 2x + x Combine like terms: 2x + x = 3x 121 = 46 + 3x Solving 121 = 46 + 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. 121 + -3x = 46 + 3x + -3x Combine like terms: 3x + -3x = 0 121 + -3x = 46 + 0 121 + -3x = 46 Add '-121' to each side of the equation. 121 + -121 + -3x = 46 + -121 Combine like terms: 121 + -121 = 0 0 + -3x = 46 + -121 -3x = 46 + -121 Combine like terms: 46 + -121 = -75 -3x = -75 Divide each side by '-3'. x = 25 Simplifying x = 25
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