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Simplifying -5 + 2(2x + -13) = -21 Reorder the terms: -5 + 2(-13 + 2x) = -21 -5 + (-13 * 2 + 2x * 2) = -21 -5 + (-26 + 4x) = -21 Combine like terms: -5 + -26 = -31 -31 + 4x = -21 Solving -31 + 4x = -21 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 = -21 + 31 Combine like terms: -31 + 31 = 0 0 + 4x = -21 + 31 4x = -21 + 31 Combine like terms: -21 + 31 = 10 4x = 10 Divide each side by '4'. x = 2.5 Simplifying x = 2.5
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