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Simplifying (x + 19) = (3x + -21) Reorder the terms: (19 + x) = (3x + -21) Remove parenthesis around (19 + x) 19 + x = (3x + -21) Reorder the terms: 19 + x = (-21 + 3x) Remove parenthesis around (-21 + 3x) 19 + x = -21 + 3x Solving 19 + x = -21 + 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. 19 + x + -3x = -21 + 3x + -3x Combine like terms: x + -3x = -2x 19 + -2x = -21 + 3x + -3x Combine like terms: 3x + -3x = 0 19 + -2x = -21 + 0 19 + -2x = -21 Add '-19' to each side of the equation. 19 + -19 + -2x = -21 + -19 Combine like terms: 19 + -19 = 0 0 + -2x = -21 + -19 -2x = -21 + -19 Combine like terms: -21 + -19 = -40 -2x = -40 Divide each side by '-2'. x = 20 Simplifying x = 20
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