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Simplifying 19 + -3x = 21 + x Solving 19 + -3x = 21 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 19 + -3x + -1x = 21 + x + -1x Combine like terms: -3x + -1x = -4x 19 + -4x = 21 + x + -1x Combine like terms: x + -1x = 0 19 + -4x = 21 + 0 19 + -4x = 21 Add '-19' to each side of the equation. 19 + -19 + -4x = 21 + -19 Combine like terms: 19 + -19 = 0 0 + -4x = 21 + -19 -4x = 21 + -19 Combine like terms: 21 + -19 = 2 -4x = 2 Divide each side by '-4'. x = -0.5 Simplifying x = -0.5
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