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Simplifying 7a + 16 + -1a + -7 = -11 + 2a Reorder the terms: 16 + -7 + 7a + -1a = -11 + 2a Combine like terms: 16 + -7 = 9 9 + 7a + -1a = -11 + 2a Combine like terms: 7a + -1a = 6a 9 + 6a = -11 + 2a Solving 9 + 6a = -11 + 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. 9 + 6a + -2a = -11 + 2a + -2a Combine like terms: 6a + -2a = 4a 9 + 4a = -11 + 2a + -2a Combine like terms: 2a + -2a = 0 9 + 4a = -11 + 0 9 + 4a = -11 Add '-9' to each side of the equation. 9 + -9 + 4a = -11 + -9 Combine like terms: 9 + -9 = 0 0 + 4a = -11 + -9 4a = -11 + -9 Combine like terms: -11 + -9 = -20 4a = -20 Divide each side by '4'. a = -5 Simplifying a = -5
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