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Simplifying 685 = 85 + -2x Solving 685 = 85 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 685 + 2x = 85 + -2x + 2x Combine like terms: -2x + 2x = 0 685 + 2x = 85 + 0 685 + 2x = 85 Add '-685' to each side of the equation. 685 + -685 + 2x = 85 + -685 Combine like terms: 685 + -685 = 0 0 + 2x = 85 + -685 2x = 85 + -685 Combine like terms: 85 + -685 = -600 2x = -600 Divide each side by '2'. x = -300 Simplifying x = -300
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