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Simplifying 2x + -4(x + 3) = 15 Reorder the terms: 2x + -4(3 + x) = 15 2x + (3 * -4 + x * -4) = 15 2x + (-12 + -4x) = 15 Reorder the terms: -12 + 2x + -4x = 15 Combine like terms: 2x + -4x = -2x -12 + -2x = 15 Solving -12 + -2x = 15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -2x = 15 + 12 Combine like terms: -12 + 12 = 0 0 + -2x = 15 + 12 -2x = 15 + 12 Combine like terms: 15 + 12 = 27 -2x = 27 Divide each side by '-2'. x = -13.5 Simplifying x = -13.5
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