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Simplifying -139 = -7x + -6x + -9 Reorder the terms: -139 = -9 + -7x + -6x Combine like terms: -7x + -6x = -13x -139 = -9 + -13x Solving -139 = -9 + -13x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13x' to each side of the equation. -139 + 13x = -9 + -13x + 13x Combine like terms: -13x + 13x = 0 -139 + 13x = -9 + 0 -139 + 13x = -9 Add '139' to each side of the equation. -139 + 139 + 13x = -9 + 139 Combine like terms: -139 + 139 = 0 0 + 13x = -9 + 139 13x = -9 + 139 Combine like terms: -9 + 139 = 130 13x = 130 Divide each side by '13'. x = 10 Simplifying x = 10
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