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Simplifying 87 = -1x + -7x + -9 Reorder the terms: 87 = -9 + -1x + -7x Combine like terms: -1x + -7x = -8x 87 = -9 + -8x Solving 87 = -9 + -8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8x' to each side of the equation. 87 + 8x = -9 + -8x + 8x Combine like terms: -8x + 8x = 0 87 + 8x = -9 + 0 87 + 8x = -9 Add '-87' to each side of the equation. 87 + -87 + 8x = -9 + -87 Combine like terms: 87 + -87 = 0 0 + 8x = -9 + -87 8x = -9 + -87 Combine like terms: -9 + -87 = -96 8x = -96 Divide each side by '8'. x = -12 Simplifying x = -12
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