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Simplifying 72 = 9a + -2 * 1 Multiply -2 * 1 72 = 9a + -2 Reorder the terms: 72 = -2 + 9a Solving 72 = -2 + 9a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9a' to each side of the equation. 72 + -9a = -2 + 9a + -9a Combine like terms: 9a + -9a = 0 72 + -9a = -2 + 0 72 + -9a = -2 Add '-72' to each side of the equation. 72 + -72 + -9a = -2 + -72 Combine like terms: 72 + -72 = 0 0 + -9a = -2 + -72 -9a = -2 + -72 Combine like terms: -2 + -72 = -74 -9a = -74 Divide each side by '-9'. a = 8.222222222 Simplifying a = 8.222222222
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