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Simplifying 7a + 12 = 9 Reorder the terms: 12 + 7a = 9 Solving 12 + 7a = 9 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 7a = 9 + -12 Combine like terms: 12 + -12 = 0 0 + 7a = 9 + -12 7a = 9 + -12 Combine like terms: 9 + -12 = -3 7a = -3 Divide each side by '7'. a = -0.4285714286 Simplifying a = -0.4285714286
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