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Simplifying 7x + -6 = 21x Reorder the terms: -6 + 7x = 21x Solving -6 + 7x = 21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21x' to each side of the equation. -6 + 7x + -21x = 21x + -21x Combine like terms: 7x + -21x = -14x -6 + -14x = 21x + -21x Combine like terms: 21x + -21x = 0 -6 + -14x = 0 Add '6' to each side of the equation. -6 + 6 + -14x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -14x = 0 + 6 -14x = 0 + 6 Combine like terms: 0 + 6 = 6 -14x = 6 Divide each side by '-14'. x = -0.4285714286 Simplifying x = -0.4285714286
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