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Simplifying 9 + 3a + -7 = -2 Reorder the terms: 9 + -7 + 3a = -2 Combine like terms: 9 + -7 = 2 2 + 3a = -2 Solving 2 + 3a = -2 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3a = -2 + -2 Combine like terms: 2 + -2 = 0 0 + 3a = -2 + -2 3a = -2 + -2 Combine like terms: -2 + -2 = -4 3a = -4 Divide each side by '3'. a = -1.333333333 Simplifying a = -1.333333333
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