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Simplifying 8 + -7x = 80 + -21x Solving 8 + -7x = 80 + -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. 8 + -7x + 21x = 80 + -21x + 21x Combine like terms: -7x + 21x = 14x 8 + 14x = 80 + -21x + 21x Combine like terms: -21x + 21x = 0 8 + 14x = 80 + 0 8 + 14x = 80 Add '-8' to each side of the equation. 8 + -8 + 14x = 80 + -8 Combine like terms: 8 + -8 = 0 0 + 14x = 80 + -8 14x = 80 + -8 Combine like terms: 80 + -8 = 72 14x = 72 Divide each side by '14'. x = 5.142857143 Simplifying x = 5.142857143
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