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Simplifying 31 + -1x(-4) = -87 Reorder the terms for easier multiplication: 31 + -1 * -4x = -87 Multiply -1 * -4 31 + 4x = -87 Solving 31 + 4x = -87 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-31' to each side of the equation. 31 + -31 + 4x = -87 + -31 Combine like terms: 31 + -31 = 0 0 + 4x = -87 + -31 4x = -87 + -31 Combine like terms: -87 + -31 = -118 4x = -118 Divide each side by '4'. x = -29.5 Simplifying x = -29.5
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