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Simplifying -5 + -1(15a + -1) = 2(-2 + -7a) + -1a Reorder the terms: -5 + -1(-1 + 15a) = 2(-2 + -7a) + -1a -5 + (-1 * -1 + 15a * -1) = 2(-2 + -7a) + -1a -5 + (1 + -15a) = 2(-2 + -7a) + -1a Combine like terms: -5 + 1 = -4 -4 + -15a = 2(-2 + -7a) + -1a -4 + -15a = (-2 * 2 + -7a * 2) + -1a -4 + -15a = (-4 + -14a) + -1a Combine like terms: -14a + -1a = -15a -4 + -15a = -4 + -15a Add '4' to each side of the equation. -4 + 4 + -15a = -4 + 4 + -15a Combine like terms: -4 + 4 = 0 0 + -15a = -4 + 4 + -15a -15a = -4 + 4 + -15a Combine like terms: -4 + 4 = 0 -15a = 0 + -15a -15a = -15a Add '15a' to each side of the equation. -15a + 15a = -15a + 15a Combine like terms: -15a + 15a = 0 0 = -15a + 15a Combine like terms: -15a + 15a = 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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