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Simplifying (a + 30) = (a + -18) Reorder the terms: (30 + a) = (a + -18) Remove parenthesis around (30 + a) 30 + a = (a + -18) Reorder the terms: 30 + a = (-18 + a) Remove parenthesis around (-18 + a) 30 + a = -18 + a Add '-1a' to each side of the equation. 30 + a + -1a = -18 + a + -1a Combine like terms: a + -1a = 0 30 + 0 = -18 + a + -1a 30 = -18 + a + -1a Combine like terms: a + -1a = 0 30 = -18 + 0 30 = -18 Solving 30 = -18 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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