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Simplifying 21 = 27a Solving 21 = 27a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-27a' to each side of the equation. 21 + -27a = 27a + -27a Combine like terms: 27a + -27a = 0 21 + -27a = 0 Add '-21' to each side of the equation. 21 + -21 + -27a = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -27a = 0 + -21 -27a = 0 + -21 Combine like terms: 0 + -21 = -21 -27a = -21 Divide each side by '-27'. a = 0.7777777778 Simplifying a = 0.7777777778
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