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Simplifying 2x + 19 = 4x + 21 Reorder the terms: 19 + 2x = 4x + 21 Reorder the terms: 19 + 2x = 21 + 4x Solving 19 + 2x = 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. 19 + 2x + -4x = 21 + 4x + -4x Combine like terms: 2x + -4x = -2x 19 + -2x = 21 + 4x + -4x Combine like terms: 4x + -4x = 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 = 2 -2x = 2 Divide each side by '-2'. x = -1 Simplifying x = -1
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