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Simplifying 39.99 + 0.45a = 44.99 + 40a Solving 39.99 + 0.45a = 44.99 + 40a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-40a' to each side of the equation. 39.99 + 0.45a + -40a = 44.99 + 40a + -40a Combine like terms: 0.45a + -40a = -39.55a 39.99 + -39.55a = 44.99 + 40a + -40a Combine like terms: 40a + -40a = 0 39.99 + -39.55a = 44.99 + 0 39.99 + -39.55a = 44.99 Add '-39.99' to each side of the equation. 39.99 + -39.99 + -39.55a = 44.99 + -39.99 Combine like terms: 39.99 + -39.99 = 0.00 0.00 + -39.55a = 44.99 + -39.99 -39.55a = 44.99 + -39.99 Combine like terms: 44.99 + -39.99 = 5 -39.55a = 5 Divide each side by '-39.55'. a = -0.1264222503 Simplifying a = -0.1264222503
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