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Simplifying 2a + -21a + -65 = 0 Reorder the terms: -65 + 2a + -21a = 0 Combine like terms: 2a + -21a = -19a -65 + -19a = 0 Solving -65 + -19a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '65' to each side of the equation. -65 + 65 + -19a = 0 + 65 Combine like terms: -65 + 65 = 0 0 + -19a = 0 + 65 -19a = 0 + 65 Combine like terms: 0 + 65 = 65 -19a = 65 Divide each side by '-19'. a = -3.421052632 Simplifying a = -3.421052632
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