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Simplifying -12a + -1(-4a + 7) = 0 Reorder the terms: -12a + -1(7 + -4a) = 0 -12a + (7 * -1 + -4a * -1) = 0 -12a + (-7 + 4a) = 0 Reorder the terms: -7 + -12a + 4a = 0 Combine like terms: -12a + 4a = -8a -7 + -8a = 0 Solving -7 + -8a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -8a = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -8a = 0 + 7 -8a = 0 + 7 Combine like terms: 0 + 7 = 7 -8a = 7 Divide each side by '-8'. a = -0.875 Simplifying a = -0.875
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