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Simplifying 9(a + 2) = 9(7a + 2) Reorder the terms: 9(2 + a) = 9(7a + 2) (2 * 9 + a * 9) = 9(7a + 2) (18 + 9a) = 9(7a + 2) Reorder the terms: 18 + 9a = 9(2 + 7a) 18 + 9a = (2 * 9 + 7a * 9) 18 + 9a = (18 + 63a) Add '-18' to each side of the equation. 18 + -18 + 9a = 18 + -18 + 63a Combine like terms: 18 + -18 = 0 0 + 9a = 18 + -18 + 63a 9a = 18 + -18 + 63a Combine like terms: 18 + -18 = 0 9a = 0 + 63a 9a = 63a Solving 9a = 63a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-63a' to each side of the equation. 9a + -63a = 63a + -63a Combine like terms: 9a + -63a = -54a -54a = 63a + -63a Combine like terms: 63a + -63a = 0 -54a = 0 Divide each side by '-54'. a = 0 Simplifying a = 0
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