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Simplifying -4a + 123 = 2a + 81 Reorder the terms: 123 + -4a = 2a + 81 Reorder the terms: 123 + -4a = 81 + 2a Solving 123 + -4a = 81 + 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. 123 + -4a + -2a = 81 + 2a + -2a Combine like terms: -4a + -2a = -6a 123 + -6a = 81 + 2a + -2a Combine like terms: 2a + -2a = 0 123 + -6a = 81 + 0 123 + -6a = 81 Add '-123' to each side of the equation. 123 + -123 + -6a = 81 + -123 Combine like terms: 123 + -123 = 0 0 + -6a = 81 + -123 -6a = 81 + -123 Combine like terms: 81 + -123 = -42 -6a = -42 Divide each side by '-6'. a = 7 Simplifying a = 7
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