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Simplifying 7x + 4(-2x + -5) = -31 Reorder the terms: 7x + 4(-5 + -2x) = -31 7x + (-5 * 4 + -2x * 4) = -31 7x + (-20 + -8x) = -31 Reorder the terms: -20 + 7x + -8x = -31 Combine like terms: 7x + -8x = -1x -20 + -1x = -31 Solving -20 + -1x = -31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -1x = -31 + 20 Combine like terms: -20 + 20 = 0 0 + -1x = -31 + 20 -1x = -31 + 20 Combine like terms: -31 + 20 = -11 -1x = -11 Divide each side by '-1'. x = 11 Simplifying x = 11
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