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Simplifying 7x + 13 = 85 + -2x Reorder the terms: 13 + 7x = 85 + -2x Solving 13 + 7x = 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. 13 + 7x + 2x = 85 + -2x + 2x Combine like terms: 7x + 2x = 9x 13 + 9x = 85 + -2x + 2x Combine like terms: -2x + 2x = 0 13 + 9x = 85 + 0 13 + 9x = 85 Add '-13' to each side of the equation. 13 + -13 + 9x = 85 + -13 Combine like terms: 13 + -13 = 0 0 + 9x = 85 + -13 9x = 85 + -13 Combine like terms: 85 + -13 = 72 9x = 72 Divide each side by '9'. x = 8 Simplifying x = 8
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