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Simplifying 15(2a + -1) = 2a Reorder the terms: 15(-1 + 2a) = 2a (-1 * 15 + 2a * 15) = 2a (-15 + 30a) = 2a Solving -15 + 30a = 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. -15 + 30a + -2a = 2a + -2a Combine like terms: 30a + -2a = 28a -15 + 28a = 2a + -2a Combine like terms: 2a + -2a = 0 -15 + 28a = 0 Add '15' to each side of the equation. -15 + 15 + 28a = 0 + 15 Combine like terms: -15 + 15 = 0 0 + 28a = 0 + 15 28a = 0 + 15 Combine like terms: 0 + 15 = 15 28a = 15 Divide each side by '28'. a = 0.5357142857 Simplifying a = 0.5357142857
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