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Simplifying 7 + -3(x + 1) = 31 Reorder the terms: 7 + -3(1 + x) = 31 7 + (1 * -3 + x * -3) = 31 7 + (-3 + -3x) = 31 Combine like terms: 7 + -3 = 4 4 + -3x = 31 Solving 4 + -3x = 31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -3x = 31 + -4 Combine like terms: 4 + -4 = 0 0 + -3x = 31 + -4 -3x = 31 + -4 Combine like terms: 31 + -4 = 27 -3x = 27 Divide each side by '-3'. x = -9 Simplifying x = -9
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