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Simplifying 15 + 22x = 20 + 21x Solving 15 + 22x = 20 + 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. 15 + 22x + -21x = 20 + 21x + -21x Combine like terms: 22x + -21x = 1x 15 + 1x = 20 + 21x + -21x Combine like terms: 21x + -21x = 0 15 + 1x = 20 + 0 15 + 1x = 20 Add '-15' to each side of the equation. 15 + -15 + 1x = 20 + -15 Combine like terms: 15 + -15 = 0 0 + 1x = 20 + -15 1x = 20 + -15 Combine like terms: 20 + -15 = 5 1x = 5 Divide each side by '1'. x = 5 Simplifying x = 5
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