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Simplifying 12 + -1a = 16 + -2a Solving 12 + -1a = 16 + -2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2a' to each side of the equation. 12 + -1a + 2a = 16 + -2a + 2a Combine like terms: -1a + 2a = 1a 12 + 1a = 16 + -2a + 2a Combine like terms: -2a + 2a = 0 12 + 1a = 16 + 0 12 + 1a = 16 Add '-12' to each side of the equation. 12 + -12 + 1a = 16 + -12 Combine like terms: 12 + -12 = 0 0 + 1a = 16 + -12 1a = 16 + -12 Combine like terms: 16 + -12 = 4 1a = 4 Divide each side by '1'. a = 4 Simplifying a = 4
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