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Simplifying -1a + -7 = 2a + 8 Reorder the terms: -7 + -1a = 2a + 8 Reorder the terms: -7 + -1a = 8 + 2a Solving -7 + -1a = 8 + 2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2a' to each side of the equation. -7 + -1a + -2a = 8 + 2a + -2a Combine like terms: -1a + -2a = -3a -7 + -3a = 8 + 2a + -2a Combine like terms: 2a + -2a = 0 -7 + -3a = 8 + 0 -7 + -3a = 8 Add '7' to each side of the equation. -7 + 7 + -3a = 8 + 7 Combine like terms: -7 + 7 = 0 0 + -3a = 8 + 7 -3a = 8 + 7 Combine like terms: 8 + 7 = 15 -3a = 15 Divide each side by '-3'. a = -5 Simplifying a = -5
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