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Simplifying 5a + 7 = 20 + a Reorder the terms: 7 + 5a = 20 + a Solving 7 + 5a = 20 + a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. 7 + 5a + -1a = 20 + a + -1a Combine like terms: 5a + -1a = 4a 7 + 4a = 20 + a + -1a Combine like terms: a + -1a = 0 7 + 4a = 20 + 0 7 + 4a = 20 Add '-7' to each side of the equation. 7 + -7 + 4a = 20 + -7 Combine like terms: 7 + -7 = 0 0 + 4a = 20 + -7 4a = 20 + -7 Combine like terms: 20 + -7 = 13 4a = 13 Divide each side by '4'. a = 3.25 Simplifying a = 3.25
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