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Simplifying 7a + 2(2a + 8) = 137 Reorder the terms: 7a + 2(8 + 2a) = 137 7a + (8 * 2 + 2a * 2) = 137 7a + (16 + 4a) = 137 Reorder the terms: 16 + 7a + 4a = 137 Combine like terms: 7a + 4a = 11a 16 + 11a = 137 Solving 16 + 11a = 137 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + 11a = 137 + -16 Combine like terms: 16 + -16 = 0 0 + 11a = 137 + -16 11a = 137 + -16 Combine like terms: 137 + -16 = 121 11a = 121 Divide each side by '11'. a = 11 Simplifying a = 11
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