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Simplifying -7 + 4(3a + 1) = -7 Reorder the terms: -7 + 4(1 + 3a) = -7 -7 + (1 * 4 + 3a * 4) = -7 -7 + (4 + 12a) = -7 Combine like terms: -7 + 4 = -3 -3 + 12a = -7 Solving -3 + 12a = -7 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 12a = -7 + 3 Combine like terms: -3 + 3 = 0 0 + 12a = -7 + 3 12a = -7 + 3 Combine like terms: -7 + 3 = -4 12a = -4 Divide each side by '12'. a = -0.3333333333 Simplifying a = -0.3333333333
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