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Simplifying 21x + 8 = 15 + -4x Reorder the terms: 8 + 21x = 15 + -4x Solving 8 + 21x = 15 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. 8 + 21x + 4x = 15 + -4x + 4x Combine like terms: 21x + 4x = 25x 8 + 25x = 15 + -4x + 4x Combine like terms: -4x + 4x = 0 8 + 25x = 15 + 0 8 + 25x = 15 Add '-8' to each side of the equation. 8 + -8 + 25x = 15 + -8 Combine like terms: 8 + -8 = 0 0 + 25x = 15 + -8 25x = 15 + -8 Combine like terms: 15 + -8 = 7 25x = 7 Divide each side by '25'. x = 0.28 Simplifying x = 0.28
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