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Simplifying 7a + -1(2a + -9) = 16 Reorder the terms: 7a + -1(-9 + 2a) = 16 7a + (-9 * -1 + 2a * -1) = 16 7a + (9 + -2a) = 16 Reorder the terms: 9 + 7a + -2a = 16 Combine like terms: 7a + -2a = 5a 9 + 5a = 16 Solving 9 + 5a = 16 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 5a = 16 + -9 Combine like terms: 9 + -9 = 0 0 + 5a = 16 + -9 5a = 16 + -9 Combine like terms: 16 + -9 = 7 5a = 7 Divide each side by '5'. a = 1.4 Simplifying a = 1.4
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