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Simplifying 21x + -2 = 5x + 142 Reorder the terms: -2 + 21x = 5x + 142 Reorder the terms: -2 + 21x = 142 + 5x Solving -2 + 21x = 142 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. -2 + 21x + -5x = 142 + 5x + -5x Combine like terms: 21x + -5x = 16x -2 + 16x = 142 + 5x + -5x Combine like terms: 5x + -5x = 0 -2 + 16x = 142 + 0 -2 + 16x = 142 Add '2' to each side of the equation. -2 + 2 + 16x = 142 + 2 Combine like terms: -2 + 2 = 0 0 + 16x = 142 + 2 16x = 142 + 2 Combine like terms: 142 + 2 = 144 16x = 144 Divide each side by '16'. x = 9 Simplifying x = 9
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