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Simplifying 2x + -3 * 39 = 21 Multiply -3 * 39 2x + -117 = 21 Reorder the terms: -117 + 2x = 21 Solving -117 + 2x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '117' to each side of the equation. -117 + 117 + 2x = 21 + 117 Combine like terms: -117 + 117 = 0 0 + 2x = 21 + 117 2x = 21 + 117 Combine like terms: 21 + 117 = 138 2x = 138 Divide each side by '2'. x = 69 Simplifying x = 69
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