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Simplifying 12 + a = 16 Solving 12 + a = 16 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 = 16 + -12 Combine like terms: 12 + -12 = 0 0 + a = 16 + -12 a = 16 + -12 Combine like terms: 16 + -12 = 4 a = 4 Simplifying a = 4
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