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Simplifying x + -20 = -3(x + 4) Reorder the terms: -20 + x = -3(x + 4) Reorder the terms: -20 + x = -3(4 + x) -20 + x = (4 * -3 + x * -3) -20 + x = (-12 + -3x) Solving -20 + x = -12 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. -20 + x + 3x = -12 + -3x + 3x Combine like terms: x + 3x = 4x -20 + 4x = -12 + -3x + 3x Combine like terms: -3x + 3x = 0 -20 + 4x = -12 + 0 -20 + 4x = -12 Add '20' to each side of the equation. -20 + 20 + 4x = -12 + 20 Combine like terms: -20 + 20 = 0 0 + 4x = -12 + 20 4x = -12 + 20 Combine like terms: -12 + 20 = 8 4x = 8 Divide each side by '4'. x = 2 Simplifying x = 2
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