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Simplifying 5a + -1 + 21b = 3a Reorder the terms: -1 + 5a + 21b = 3a Solving -1 + 5a + 21b = 3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3a' to each side of the equation. -1 + 5a + -3a + 21b = 3a + -3a Combine like terms: 5a + -3a = 2a -1 + 2a + 21b = 3a + -3a Combine like terms: 3a + -3a = 0 -1 + 2a + 21b = 0 Add '1' to each side of the equation. -1 + 2a + 1 + 21b = 0 + 1 Reorder the terms: -1 + 1 + 2a + 21b = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 2a + 21b = 0 + 1 2a + 21b = 0 + 1 Combine like terms: 0 + 1 = 1 2a + 21b = 1 Add '-21b' to each side of the equation. 2a + 21b + -21b = 1 + -21b Combine like terms: 21b + -21b = 0 2a + 0 = 1 + -21b 2a = 1 + -21b Divide each side by '2'. a = 0.5 + -10.5b Simplifying a = 0.5 + -10.5b
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