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Simplifying 0.33333333333(21 + -3a) = 6 + -1a (21 * 0.33333333333 + -3a * 0.33333333333) = 6 + -1a (7 + -1a) = 6 + -1a Add 'a' to each side of the equation. 7 + -1a + a = 6 + -1a + a Combine like terms: -1a + a = 0 7 + 0 = 6 + -1a + a 7 = 6 + -1a + a Combine like terms: -1a + a = 0 7 = 6 + 0 7 = 6 Solving 7 = 6 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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