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Simplifying -2x + -7(3x + -1) = 31 Reorder the terms: -2x + -7(-1 + 3x) = 31 -2x + (-1 * -7 + 3x * -7) = 31 -2x + (7 + -21x) = 31 Reorder the terms: 7 + -2x + -21x = 31 Combine like terms: -2x + -21x = -23x 7 + -23x = 31 Solving 7 + -23x = 31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -23x = 31 + -7 Combine like terms: 7 + -7 = 0 0 + -23x = 31 + -7 -23x = 31 + -7 Combine like terms: 31 + -7 = 24 -23x = 24 Divide each side by '-23'. x = -1.043478261 Simplifying x = -1.043478261
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