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Simplifying 10a + 9b = 31 Solving 10a + 9b = 31 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9b' to each side of the equation. 10a + 9b + -9b = 31 + -9b Combine like terms: 9b + -9b = 0 10a + 0 = 31 + -9b 10a = 31 + -9b Divide each side by '10'. a = 3.1 + -0.9b Simplifying a = 3.1 + -0.9b
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