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Simplifying -3(a + 4) = 2a + -1 Reorder the terms: -3(4 + a) = 2a + -1 (4 * -3 + a * -3) = 2a + -1 (-12 + -3a) = 2a + -1 Reorder the terms: -12 + -3a = -1 + 2a Solving -12 + -3a = -1 + 2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2a' to each side of the equation. -12 + -3a + -2a = -1 + 2a + -2a Combine like terms: -3a + -2a = -5a -12 + -5a = -1 + 2a + -2a Combine like terms: 2a + -2a = 0 -12 + -5a = -1 + 0 -12 + -5a = -1 Add '12' to each side of the equation. -12 + 12 + -5a = -1 + 12 Combine like terms: -12 + 12 = 0 0 + -5a = -1 + 12 -5a = -1 + 12 Combine like terms: -1 + 12 = 11 -5a = 11 Divide each side by '-5'. a = -2.2 Simplifying a = -2.2
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