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Simplifying x + -7 = -7x + 81 Reorder the terms: -7 + x = -7x + 81 Reorder the terms: -7 + x = 81 + -7x Solving -7 + x = 81 + -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. -7 + x + 7x = 81 + -7x + 7x Combine like terms: x + 7x = 8x -7 + 8x = 81 + -7x + 7x Combine like terms: -7x + 7x = 0 -7 + 8x = 81 + 0 -7 + 8x = 81 Add '7' to each side of the equation. -7 + 7 + 8x = 81 + 7 Combine like terms: -7 + 7 = 0 0 + 8x = 81 + 7 8x = 81 + 7 Combine like terms: 81 + 7 = 88 8x = 88 Divide each side by '8'. x = 11 Simplifying x = 11
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