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Simplifying 9a + 4 = 2a + 20 Reorder the terms: 4 + 9a = 2a + 20 Reorder the terms: 4 + 9a = 20 + 2a Solving 4 + 9a = 20 + 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. 4 + 9a + -2a = 20 + 2a + -2a Combine like terms: 9a + -2a = 7a 4 + 7a = 20 + 2a + -2a Combine like terms: 2a + -2a = 0 4 + 7a = 20 + 0 4 + 7a = 20 Add '-4' to each side of the equation. 4 + -4 + 7a = 20 + -4 Combine like terms: 4 + -4 = 0 0 + 7a = 20 + -4 7a = 20 + -4 Combine like terms: 20 + -4 = 16 7a = 16 Divide each side by '7'. a = 2.285714286 Simplifying a = 2.285714286
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