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Simplifying -4(3.1 + x) = -38 (3.1 * -4 + x * -4) = -38 (-12.4 + -4x) = -38 Solving -12.4 + -4x = -38 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.4' to each side of the equation. -12.4 + 12.4 + -4x = -38 + 12.4 Combine like terms: -12.4 + 12.4 = 0.0 0.0 + -4x = -38 + 12.4 -4x = -38 + 12.4 Combine like terms: -38 + 12.4 = -25.6 -4x = -25.6 Divide each side by '-4'. x = 6.4 Simplifying x = 6.4
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