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Simplifying -86 = -3x + 2(-2x + -15) Reorder the terms: -86 = -3x + 2(-15 + -2x) -86 = -3x + (-15 * 2 + -2x * 2) -86 = -3x + (-30 + -4x) Reorder the terms: -86 = -30 + -3x + -4x Combine like terms: -3x + -4x = -7x -86 = -30 + -7x Solving -86 = -30 + -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. -86 + 7x = -30 + -7x + 7x Combine like terms: -7x + 7x = 0 -86 + 7x = -30 + 0 -86 + 7x = -30 Add '86' to each side of the equation. -86 + 86 + 7x = -30 + 86 Combine like terms: -86 + 86 = 0 0 + 7x = -30 + 86 7x = -30 + 86 Combine like terms: -30 + 86 = 56 7x = 56 Divide each side by '7'. x = 8 Simplifying x = 8
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