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Simplifying (2a + 3) = a + 90 Reorder the terms: (3 + 2a) = a + 90 Remove parenthesis around (3 + 2a) 3 + 2a = a + 90 Reorder the terms: 3 + 2a = 90 + a Solving 3 + 2a = 90 + 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. 3 + 2a + -1a = 90 + a + -1a Combine like terms: 2a + -1a = 1a 3 + 1a = 90 + a + -1a Combine like terms: a + -1a = 0 3 + 1a = 90 + 0 3 + 1a = 90 Add '-3' to each side of the equation. 3 + -3 + 1a = 90 + -3 Combine like terms: 3 + -3 = 0 0 + 1a = 90 + -3 1a = 90 + -3 Combine like terms: 90 + -3 = 87 1a = 87 Divide each side by '1'. a = 87 Simplifying a = 87
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