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Simplifying 6 + -7x = 129 + -28x Solving 6 + -7x = 129 + -28x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28x' to each side of the equation. 6 + -7x + 28x = 129 + -28x + 28x Combine like terms: -7x + 28x = 21x 6 + 21x = 129 + -28x + 28x Combine like terms: -28x + 28x = 0 6 + 21x = 129 + 0 6 + 21x = 129 Add '-6' to each side of the equation. 6 + -6 + 21x = 129 + -6 Combine like terms: 6 + -6 = 0 0 + 21x = 129 + -6 21x = 129 + -6 Combine like terms: 129 + -6 = 123 21x = 123 Divide each side by '21'. x = 5.857142857 Simplifying x = 5.857142857
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