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Simplifying 18x + -2 = 78 + -21x Reorder the terms: -2 + 18x = 78 + -21x Solving -2 + 18x = 78 + -21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21x' to each side of the equation. -2 + 18x + 21x = 78 + -21x + 21x Combine like terms: 18x + 21x = 39x -2 + 39x = 78 + -21x + 21x Combine like terms: -21x + 21x = 0 -2 + 39x = 78 + 0 -2 + 39x = 78 Add '2' to each side of the equation. -2 + 2 + 39x = 78 + 2 Combine like terms: -2 + 2 = 0 0 + 39x = 78 + 2 39x = 78 + 2 Combine like terms: 78 + 2 = 80 39x = 80 Divide each side by '39'. x = 2.051282051 Simplifying x = 2.051282051
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