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Simplifying -21 + -15a = -8 + 5(-3a + 2) Reorder the terms: -21 + -15a = -8 + 5(2 + -3a) -21 + -15a = -8 + (2 * 5 + -3a * 5) -21 + -15a = -8 + (10 + -15a) Combine like terms: -8 + 10 = 2 -21 + -15a = 2 + -15a Add '15a' to each side of the equation. -21 + -15a + 15a = 2 + -15a + 15a Combine like terms: -15a + 15a = 0 -21 + 0 = 2 + -15a + 15a -21 = 2 + -15a + 15a Combine like terms: -15a + 15a = 0 -21 = 2 + 0 -21 = 2 Solving -21 = 2 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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