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Simplifying 12a + -2 = 5 + -9a Reorder the terms: -2 + 12a = 5 + -9a Solving -2 + 12a = 5 + -9a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '9a' to each side of the equation. -2 + 12a + 9a = 5 + -9a + 9a Combine like terms: 12a + 9a = 21a -2 + 21a = 5 + -9a + 9a Combine like terms: -9a + 9a = 0 -2 + 21a = 5 + 0 -2 + 21a = 5 Add '2' to each side of the equation. -2 + 2 + 21a = 5 + 2 Combine like terms: -2 + 2 = 0 0 + 21a = 5 + 2 21a = 5 + 2 Combine like terms: 5 + 2 = 7 21a = 7 Divide each side by '21'. a = 0.3333333333 Simplifying a = 0.3333333333
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