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Simplifying 7 + -4(2a + 4) = 0 Reorder the terms: 7 + -4(4 + 2a) = 0 7 + (4 * -4 + 2a * -4) = 0 7 + (-16 + -8a) = 0 Combine like terms: 7 + -16 = -9 -9 + -8a = 0 Solving -9 + -8a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -8a = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -8a = 0 + 9 -8a = 0 + 9 Combine like terms: 0 + 9 = 9 -8a = 9 Divide each side by '-8'. a = -1.125 Simplifying a = -1.125
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