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Simplifying -126 = -7a Solving -126 = -7a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '7a' to each side of the equation. -126 + 7a = -7a + 7a Combine like terms: -7a + 7a = 0 -126 + 7a = 0 Add '126' to each side of the equation. -126 + 126 + 7a = 0 + 126 Combine like terms: -126 + 126 = 0 0 + 7a = 0 + 126 7a = 0 + 126 Combine like terms: 0 + 126 = 126 7a = 126 Divide each side by '7'. a = 18 Simplifying a = 18
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