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Simplifying 21x + -16 = 18x + 5 Reorder the terms: -16 + 21x = 18x + 5 Reorder the terms: -16 + 21x = 5 + 18x Solving -16 + 21x = 5 + 18x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18x' to each side of the equation. -16 + 21x + -18x = 5 + 18x + -18x Combine like terms: 21x + -18x = 3x -16 + 3x = 5 + 18x + -18x Combine like terms: 18x + -18x = 0 -16 + 3x = 5 + 0 -16 + 3x = 5 Add '16' to each side of the equation. -16 + 16 + 3x = 5 + 16 Combine like terms: -16 + 16 = 0 0 + 3x = 5 + 16 3x = 5 + 16 Combine like terms: 5 + 16 = 21 3x = 21 Divide each side by '3'. x = 7 Simplifying x = 7
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