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Simplifying a + 12 = 7 Reorder the terms: 12 + a = 7 Solving 12 + a = 7 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + a = 7 + -12 Combine like terms: 12 + -12 = 0 0 + a = 7 + -12 a = 7 + -12 Combine like terms: 7 + -12 = -5 a = -5 Simplifying a = -5
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