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Simplifying 21 + -2x = 20 + -5x Solving 21 + -2x = 20 + -5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5x' to each side of the equation. 21 + -2x + 5x = 20 + -5x + 5x Combine like terms: -2x + 5x = 3x 21 + 3x = 20 + -5x + 5x Combine like terms: -5x + 5x = 0 21 + 3x = 20 + 0 21 + 3x = 20 Add '-21' to each side of the equation. 21 + -21 + 3x = 20 + -21 Combine like terms: 21 + -21 = 0 0 + 3x = 20 + -21 3x = 20 + -21 Combine like terms: 20 + -21 = -1 3x = -1 Divide each side by '3'. x = -0.3333333333 Simplifying x = -0.3333333333
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