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Simplifying 8x + 21 = 4x + 3 Reorder the terms: 21 + 8x = 4x + 3 Reorder the terms: 21 + 8x = 3 + 4x Solving 21 + 8x = 3 + 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. 21 + 8x + -4x = 3 + 4x + -4x Combine like terms: 8x + -4x = 4x 21 + 4x = 3 + 4x + -4x Combine like terms: 4x + -4x = 0 21 + 4x = 3 + 0 21 + 4x = 3 Add '-21' to each side of the equation. 21 + -21 + 4x = 3 + -21 Combine like terms: 21 + -21 = 0 0 + 4x = 3 + -21 4x = 3 + -21 Combine like terms: 3 + -21 = -18 4x = -18 Divide each side by '4'. x = -4.5 Simplifying x = -4.5
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