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Simplifying -7x + -2(3x + -4) = -31 Reorder the terms: -7x + -2(-4 + 3x) = -31 -7x + (-4 * -2 + 3x * -2) = -31 -7x + (8 + -6x) = -31 Reorder the terms: 8 + -7x + -6x = -31 Combine like terms: -7x + -6x = -13x 8 + -13x = -31 Solving 8 + -13x = -31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -13x = -31 + -8 Combine like terms: 8 + -8 = 0 0 + -13x = -31 + -8 -13x = -31 + -8 Combine like terms: -31 + -8 = -39 -13x = -39 Divide each side by '-13'. x = 3 Simplifying x = 3
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