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Simplifying 81 = -10 + 7x Solving 81 = -10 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 81 + -7x = -10 + 7x + -7x Combine like terms: 7x + -7x = 0 81 + -7x = -10 + 0 81 + -7x = -10 Add '-81' to each side of the equation. 81 + -81 + -7x = -10 + -81 Combine like terms: 81 + -81 = 0 0 + -7x = -10 + -81 -7x = -10 + -81 Combine like terms: -10 + -81 = -91 -7x = -91 Divide each side by '-7'. x = 13 Simplifying x = 13
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