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Simplifying -15a + 223 = 5a + 123 Reorder the terms: 223 + -15a = 5a + 123 Reorder the terms: 223 + -15a = 123 + 5a Solving 223 + -15a = 123 + 5a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5a' to each side of the equation. 223 + -15a + -5a = 123 + 5a + -5a Combine like terms: -15a + -5a = -20a 223 + -20a = 123 + 5a + -5a Combine like terms: 5a + -5a = 0 223 + -20a = 123 + 0 223 + -20a = 123 Add '-223' to each side of the equation. 223 + -223 + -20a = 123 + -223 Combine like terms: 223 + -223 = 0 0 + -20a = 123 + -223 -20a = 123 + -223 Combine like terms: 123 + -223 = -100 -20a = -100 Divide each side by '-20'. a = 5 Simplifying a = 5
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