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