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Simplifying -9(7a + 2) = 25 + 6a Reorder the terms: -9(2 + 7a) = 25 + 6a (2 * -9 + 7a * -9) = 25 + 6a (-18 + -63a) = 25 + 6a Solving -18 + -63a = 25 + 6a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-6a' to each side of the equation. -18 + -63a + -6a = 25 + 6a + -6a Combine like terms: -63a + -6a = -69a -18 + -69a = 25 + 6a + -6a Combine like terms: 6a + -6a = 0 -18 + -69a = 25 + 0 -18 + -69a = 25 Add '18' to each side of the equation. -18 + 18 + -69a = 25 + 18 Combine like terms: -18 + 18 = 0 0 + -69a = 25 + 18 -69a = 25 + 18 Combine like terms: 25 + 18 = 43 -69a = 43 Divide each side by '-69'. a = -0.6231884058 Simplifying a = -0.6231884058
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