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Simplifying 9 + 18 = 7a Combine like terms: 9 + 18 = 27 27 = 7a Solving 27 = 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. 27 + -7a = 7a + -7a Combine like terms: 7a + -7a = 0 27 + -7a = 0 Add '-27' to each side of the equation. 27 + -27 + -7a = 0 + -27 Combine like terms: 27 + -27 = 0 0 + -7a = 0 + -27 -7a = 0 + -27 Combine like terms: 0 + -27 = -27 -7a = -27 Divide each side by '-7'. a = 3.857142857 Simplifying a = 3.857142857
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