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Simplifying 12a + 7 = 3a Reorder the terms: 7 + 12a = 3a Solving 7 + 12a = 3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3a' to each side of the equation. 7 + 12a + -3a = 3a + -3a Combine like terms: 12a + -3a = 9a 7 + 9a = 3a + -3a Combine like terms: 3a + -3a = 0 7 + 9a = 0 Add '-7' to each side of the equation. 7 + -7 + 9a = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 9a = 0 + -7 9a = 0 + -7 Combine like terms: 0 + -7 = -7 9a = -7 Divide each side by '9'. a = -0.7777777778 Simplifying a = -0.7777777778
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