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Simplifying 3a + 4(a + -3) = 0 Reorder the terms: 3a + 4(-3 + a) = 0 3a + (-3 * 4 + a * 4) = 0 3a + (-12 + 4a) = 0 Reorder the terms: -12 + 3a + 4a = 0 Combine like terms: 3a + 4a = 7a -12 + 7a = 0 Solving -12 + 7a = 0 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 = 0 + 12 Combine like terms: -12 + 12 = 0 0 + 7a = 0 + 12 7a = 0 + 12 Combine like terms: 0 + 12 = 12 7a = 12 Divide each side by '7'. a = 1.714285714 Simplifying a = 1.714285714
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