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Simplifying -7x + 21 = -4 Reorder the terms: 21 + -7x = -4 Solving 21 + -7x = -4 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 = -4 + -21 Combine like terms: 21 + -21 = 0 0 + -7x = -4 + -21 -7x = -4 + -21 Combine like terms: -4 + -21 = -25 -7x = -25 Divide each side by '-7'. x = 3.571428571 Simplifying x = 3.571428571
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