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Simplifying 7a + 3 + (2a + -2) = 0 Reorder the terms: 7a + 3 + (-2 + 2a) = 0 Remove parenthesis around (-2 + 2a) 7a + 3 + -2 + 2a = 0 Reorder the terms: 3 + -2 + 7a + 2a = 0 Combine like terms: 3 + -2 = 1 1 + 7a + 2a = 0 Combine like terms: 7a + 2a = 9a 1 + 9a = 0 Solving 1 + 9a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 9a = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 9a = 0 + -1 9a = 0 + -1 Combine like terms: 0 + -1 = -1 9a = -1 Divide each side by '9'. a = -0.1111111111 Simplifying a = -0.1111111111
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