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Simplifying 21 + 7x = 19 Solving 21 + 7x = 19 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 7x = 19 + -21 Combine like terms: 21 + -21 = 0 0 + 7x = 19 + -21 7x = 19 + -21 Combine like terms: 19 + -21 = -2 7x = -2 Divide each side by '7'. x = -0.2857142857 Simplifying x = -0.2857142857
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