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Simplifying 181 = x + 2x + (21 + x) Remove parenthesis around (21 + x) 181 = x + 2x + 21 + x Reorder the terms: 181 = 21 + x + 2x + x Combine like terms: x + 2x = 3x 181 = 21 + 3x + x Combine like terms: 3x + x = 4x 181 = 21 + 4x Solving 181 = 21 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 181 + -4x = 21 + 4x + -4x Combine like terms: 4x + -4x = 0 181 + -4x = 21 + 0 181 + -4x = 21 Add '-181' to each side of the equation. 181 + -181 + -4x = 21 + -181 Combine like terms: 181 + -181 = 0 0 + -4x = 21 + -181 -4x = 21 + -181 Combine like terms: 21 + -181 = -160 -4x = -160 Divide each side by '-4'. x = 40 Simplifying x = 40
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