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Simplifying 7a + 9a = 3a + 4 Combine like terms: 7a + 9a = 16a 16a = 3a + 4 Reorder the terms: 16a = 4 + 3a Solving 16a = 4 + 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. 16a + -3a = 4 + 3a + -3a Combine like terms: 16a + -3a = 13a 13a = 4 + 3a + -3a Combine like terms: 3a + -3a = 0 13a = 4 + 0 13a = 4 Divide each side by '13'. a = 0.3076923077 Simplifying a = 0.3076923077
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