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Simplifying 81x + -21 = 5 + 9x Reorder the terms: -21 + 81x = 5 + 9x Solving -21 + 81x = 5 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. -21 + 81x + -9x = 5 + 9x + -9x Combine like terms: 81x + -9x = 72x -21 + 72x = 5 + 9x + -9x Combine like terms: 9x + -9x = 0 -21 + 72x = 5 + 0 -21 + 72x = 5 Add '21' to each side of the equation. -21 + 21 + 72x = 5 + 21 Combine like terms: -21 + 21 = 0 0 + 72x = 5 + 21 72x = 5 + 21 Combine like terms: 5 + 21 = 26 72x = 26 Divide each side by '72'. x = 0.3611111111 Simplifying x = 0.3611111111
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