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Simplifying (2x + 21) = (3x + -4) Reorder the terms: (21 + 2x) = (3x + -4) Remove parenthesis around (21 + 2x) 21 + 2x = (3x + -4) Reorder the terms: 21 + 2x = (-4 + 3x) Remove parenthesis around (-4 + 3x) 21 + 2x = -4 + 3x Solving 21 + 2x = -4 + 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. 21 + 2x + -3x = -4 + 3x + -3x Combine like terms: 2x + -3x = -1x 21 + -1x = -4 + 3x + -3x Combine like terms: 3x + -3x = 0 21 + -1x = -4 + 0 21 + -1x = -4 Add '-21' to each side of the equation. 21 + -21 + -1x = -4 + -21 Combine like terms: 21 + -21 = 0 0 + -1x = -4 + -21 -1x = -4 + -21 Combine like terms: -4 + -21 = -25 -1x = -25 Divide each side by '-1'. x = 25 Simplifying x = 25
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