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Simplifying -81 = 3 + 7x Solving -81 = 3 + 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 = 3 + 7x + -7x Combine like terms: 7x + -7x = 0 -81 + -7x = 3 + 0 -81 + -7x = 3 Add '81' to each side of the equation. -81 + 81 + -7x = 3 + 81 Combine like terms: -81 + 81 = 0 0 + -7x = 3 + 81 -7x = 3 + 81 Combine like terms: 3 + 81 = 84 -7x = 84 Divide each side by '-7'. x = -12 Simplifying x = -12
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