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Simplifying 21x + -4 = 42x + 17 Reorder the terms: -4 + 21x = 42x + 17 Reorder the terms: -4 + 21x = 17 + 42x Solving -4 + 21x = 17 + 42x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42x' to each side of the equation. -4 + 21x + -42x = 17 + 42x + -42x Combine like terms: 21x + -42x = -21x -4 + -21x = 17 + 42x + -42x Combine like terms: 42x + -42x = 0 -4 + -21x = 17 + 0 -4 + -21x = 17 Add '4' to each side of the equation. -4 + 4 + -21x = 17 + 4 Combine like terms: -4 + 4 = 0 0 + -21x = 17 + 4 -21x = 17 + 4 Combine like terms: 17 + 4 = 21 -21x = 21 Divide each side by '-21'. x = -1 Simplifying x = -1
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