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Simplifying x + (-7) * 3 = 12 Multiply -7 * 3 x + -21 = 12 Reorder the terms: -21 + x = 12 Solving -21 + x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + x = 12 + 21 Combine like terms: -21 + 21 = 0 0 + x = 12 + 21 x = 12 + 21 Combine like terms: 12 + 21 = 33 x = 33 Simplifying x = 33
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