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Simplifying 21 + -21x = -11x + 42 Reorder the terms: 21 + -21x = 42 + -11x Solving 21 + -21x = 42 + -11x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11x' to each side of the equation. 21 + -21x + 11x = 42 + -11x + 11x Combine like terms: -21x + 11x = -10x 21 + -10x = 42 + -11x + 11x Combine like terms: -11x + 11x = 0 21 + -10x = 42 + 0 21 + -10x = 42 Add '-21' to each side of the equation. 21 + -21 + -10x = 42 + -21 Combine like terms: 21 + -21 = 0 0 + -10x = 42 + -21 -10x = 42 + -21 Combine like terms: 42 + -21 = 21 -10x = 21 Divide each side by '-10'. x = -2.1 Simplifying x = -2.1
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