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Simplifying -18 + -8a = -3(a + 6) + -5a Reorder the terms: -18 + -8a = -3(6 + a) + -5a -18 + -8a = (6 * -3 + a * -3) + -5a -18 + -8a = (-18 + -3a) + -5a Combine like terms: -3a + -5a = -8a -18 + -8a = -18 + -8a Add '18' to each side of the equation. -18 + 18 + -8a = -18 + 18 + -8a Combine like terms: -18 + 18 = 0 0 + -8a = -18 + 18 + -8a -8a = -18 + 18 + -8a Combine like terms: -18 + 18 = 0 -8a = 0 + -8a -8a = -8a Add '8a' to each side of the equation. -8a + 8a = -8a + 8a Combine like terms: -8a + 8a = 0 0 = -8a + 8a Combine like terms: -8a + 8a = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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