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Simplifying 7 + 42x = 21x + 31 Reorder the terms: 7 + 42x = 31 + 21x Solving 7 + 42x = 31 + 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. 7 + 42x + -21x = 31 + 21x + -21x Combine like terms: 42x + -21x = 21x 7 + 21x = 31 + 21x + -21x Combine like terms: 21x + -21x = 0 7 + 21x = 31 + 0 7 + 21x = 31 Add '-7' to each side of the equation. 7 + -7 + 21x = 31 + -7 Combine like terms: 7 + -7 = 0 0 + 21x = 31 + -7 21x = 31 + -7 Combine like terms: 31 + -7 = 24 21x = 24 Divide each side by '21'. x = 1.142857143 Simplifying x = 1.142857143
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