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Simplifying 7a + -4(-4a + -7) = 0 Reorder the terms: 7a + -4(-7 + -4a) = 0 7a + (-7 * -4 + -4a * -4) = 0 7a + (28 + 16a) = 0 Reorder the terms: 28 + 7a + 16a = 0 Combine like terms: 7a + 16a = 23a 28 + 23a = 0 Solving 28 + 23a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 23a = 0 + -28 Combine like terms: 28 + -28 = 0 0 + 23a = 0 + -28 23a = 0 + -28 Combine like terms: 0 + -28 = -28 23a = -28 Divide each side by '23'. a = -1.217391304 Simplifying a = -1.217391304
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