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Simplifying a + (0.50a) + 2(0.50a) + -1 = 189 Remove parenthesis around (0.50a) a + (0.50a) + 2 * 0.50a + -1 = 189 Multiply 2 * 0.50 a + (0.50a) + 1a + -1 = 189 Reorder the terms: -1 + a + (0.50a) + 1a = 189 Combine like terms: a + (0.50a) = 1.5a -1 + 1.5a + 1a = 189 Combine like terms: 1.5a + 1a = 2.5a -1 + 2.5a = 189 Solving -1 + 2.5a = 189 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 2.5a = 189 + 1 Combine like terms: -1 + 1 = 0 0 + 2.5a = 189 + 1 2.5a = 189 + 1 Combine like terms: 189 + 1 = 190 2.5a = 190 Divide each side by '2.5'. a = 76 Simplifying a = 76
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