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Simplifying -21x + -42 = -210 Reorder the terms: -42 + -21x = -210 Solving -42 + -21x = -210 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '42' to each side of the equation. -42 + 42 + -21x = -210 + 42 Combine like terms: -42 + 42 = 0 0 + -21x = -210 + 42 -21x = -210 + 42 Combine like terms: -210 + 42 = -168 -21x = -168 Divide each side by '-21'. x = 8 Simplifying x = 8
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