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Simplifying x + -7 = -87 + -7x Reorder the terms: -7 + x = -87 + -7x Solving -7 + x = -87 + -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 = -87 + -7x + 7x Combine like terms: x + 7x = 8x -7 + 8x = -87 + -7x + 7x Combine like terms: -7x + 7x = 0 -7 + 8x = -87 + 0 -7 + 8x = -87 Add '7' to each side of the equation. -7 + 7 + 8x = -87 + 7 Combine like terms: -7 + 7 = 0 0 + 8x = -87 + 7 8x = -87 + 7 Combine like terms: -87 + 7 = -80 8x = -80 Divide each side by '8'. x = -10 Simplifying x = -10
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