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Simplifying 8 + -4a = 7a + -9 Reorder the terms: 8 + -4a = -9 + 7a Solving 8 + -4a = -9 + 7a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7a' to each side of the equation. 8 + -4a + -7a = -9 + 7a + -7a Combine like terms: -4a + -7a = -11a 8 + -11a = -9 + 7a + -7a Combine like terms: 7a + -7a = 0 8 + -11a = -9 + 0 8 + -11a = -9 Add '-8' to each side of the equation. 8 + -8 + -11a = -9 + -8 Combine like terms: 8 + -8 = 0 0 + -11a = -9 + -8 -11a = -9 + -8 Combine like terms: -9 + -8 = -17 -11a = -17 Divide each side by '-11'. a = 1.545454545 Simplifying a = 1.545454545
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