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Simplifying 9 = -5a + 7 Reorder the terms: 9 = 7 + -5a Solving 9 = 7 + -5a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '5a' to each side of the equation. 9 + 5a = 7 + -5a + 5a Combine like terms: -5a + 5a = 0 9 + 5a = 7 + 0 9 + 5a = 7 Add '-9' to each side of the equation. 9 + -9 + 5a = 7 + -9 Combine like terms: 9 + -9 = 0 0 + 5a = 7 + -9 5a = 7 + -9 Combine like terms: 7 + -9 = -2 5a = -2 Divide each side by '5'. a = -0.4 Simplifying a = -0.4
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