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Simplifying -2x + -87 + -7x = -13 Reorder the terms: -87 + -2x + -7x = -13 Combine like terms: -2x + -7x = -9x -87 + -9x = -13 Solving -87 + -9x = -13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '87' to each side of the equation. -87 + 87 + -9x = -13 + 87 Combine like terms: -87 + 87 = 0 0 + -9x = -13 + 87 -9x = -13 + 87 Combine like terms: -13 + 87 = 74 -9x = 74 Divide each side by '-9'. x = -8.222222222 Simplifying x = -8.222222222
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