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Simplifying -2(a + 15) = 7 + 3a + -37 + -5a Reorder the terms: -2(15 + a) = 7 + 3a + -37 + -5a (15 * -2 + a * -2) = 7 + 3a + -37 + -5a (-30 + -2a) = 7 + 3a + -37 + -5a Reorder the terms: -30 + -2a = 7 + -37 + 3a + -5a Combine like terms: 7 + -37 = -30 -30 + -2a = -30 + 3a + -5a Combine like terms: 3a + -5a = -2a -30 + -2a = -30 + -2a Add '30' to each side of the equation. -30 + 30 + -2a = -30 + 30 + -2a Combine like terms: -30 + 30 = 0 0 + -2a = -30 + 30 + -2a -2a = -30 + 30 + -2a Combine like terms: -30 + 30 = 0 -2a = 0 + -2a -2a = -2a Add '2a' to each side of the equation. -2a + 2a = -2a + 2a Combine like terms: -2a + 2a = 0 0 = -2a + 2a Combine like terms: -2a + 2a = 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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