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Simplifying 7a + -9 = 2a + 1 Reorder the terms: -9 + 7a = 2a + 1 Reorder the terms: -9 + 7a = 1 + 2a Solving -9 + 7a = 1 + 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. -9 + 7a + -2a = 1 + 2a + -2a Combine like terms: 7a + -2a = 5a -9 + 5a = 1 + 2a + -2a Combine like terms: 2a + -2a = 0 -9 + 5a = 1 + 0 -9 + 5a = 1 Add '9' to each side of the equation. -9 + 9 + 5a = 1 + 9 Combine like terms: -9 + 9 = 0 0 + 5a = 1 + 9 5a = 1 + 9 Combine like terms: 1 + 9 = 10 5a = 10 Divide each side by '5'. a = 2 Simplifying a = 2
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