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Simplifying 4x + 8 = 21 Reorder the terms: 8 + 4x = 21 Solving 8 + 4x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 4x = 21 + -8 Combine like terms: 8 + -8 = 0 0 + 4x = 21 + -8 4x = 21 + -8 Combine like terms: 21 + -8 = 13 4x = 13 Divide each side by '4'. x = 3.25 Simplifying x = 3.25
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