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Simplifying 21 + -1x = 1 + 6x Solving 21 + -1x = 1 + 6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6x' to each side of the equation. 21 + -1x + -6x = 1 + 6x + -6x Combine like terms: -1x + -6x = -7x 21 + -7x = 1 + 6x + -6x Combine like terms: 6x + -6x = 0 21 + -7x = 1 + 0 21 + -7x = 1 Add '-21' to each side of the equation. 21 + -21 + -7x = 1 + -21 Combine like terms: 21 + -21 = 0 0 + -7x = 1 + -21 -7x = 1 + -21 Combine like terms: 1 + -21 = -20 -7x = -20 Divide each side by '-7'. x = 2.857142857 Simplifying x = 2.857142857
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