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Simplifying 7a + 4 = 5a + 20 Reorder the terms: 4 + 7a = 5a + 20 Reorder the terms: 4 + 7a = 20 + 5a Solving 4 + 7a = 20 + 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. 4 + 7a + -5a = 20 + 5a + -5a Combine like terms: 7a + -5a = 2a 4 + 2a = 20 + 5a + -5a Combine like terms: 5a + -5a = 0 4 + 2a = 20 + 0 4 + 2a = 20 Add '-4' to each side of the equation. 4 + -4 + 2a = 20 + -4 Combine like terms: 4 + -4 = 0 0 + 2a = 20 + -4 2a = 20 + -4 Combine like terms: 20 + -4 = 16 2a = 16 Divide each side by '2'. a = 8 Simplifying a = 8
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