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Simplifying 6(a + 3) = 21 + -3(11 + -2a) Reorder the terms: 6(3 + a) = 21 + -3(11 + -2a) (3 * 6 + a * 6) = 21 + -3(11 + -2a) (18 + 6a) = 21 + -3(11 + -2a) 18 + 6a = 21 + (11 * -3 + -2a * -3) 18 + 6a = 21 + (-33 + 6a) Combine like terms: 21 + -33 = -12 18 + 6a = -12 + 6a Add '-6a' to each side of the equation. 18 + 6a + -6a = -12 + 6a + -6a Combine like terms: 6a + -6a = 0 18 + 0 = -12 + 6a + -6a 18 = -12 + 6a + -6a Combine like terms: 6a + -6a = 0 18 = -12 + 0 18 = -12 Solving 18 = -12 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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