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Simplifying 2a + 12 + a = 3(a + -4) Reorder the terms: 12 + 2a + a = 3(a + -4) Combine like terms: 2a + a = 3a 12 + 3a = 3(a + -4) Reorder the terms: 12 + 3a = 3(-4 + a) 12 + 3a = (-4 * 3 + a * 3) 12 + 3a = (-12 + 3a) Add '-3a' to each side of the equation. 12 + 3a + -3a = -12 + 3a + -3a Combine like terms: 3a + -3a = 0 12 + 0 = -12 + 3a + -3a 12 = -12 + 3a + -3a Combine like terms: 3a + -3a = 0 12 = -12 + 0 12 = -12 Solving 12 = -12 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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