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Simplifying [2a + 7] = a + -4 Reorder the terms: [7 + 2a] = a + -4 Remove brackets around [7 + 2a] 7 + 2a = a + -4 Reorder the terms: 7 + 2a = -4 + a Solving 7 + 2a = -4 + a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. 7 + 2a + -1a = -4 + a + -1a Combine like terms: 2a + -1a = 1a 7 + 1a = -4 + a + -1a Combine like terms: a + -1a = 0 7 + 1a = -4 + 0 7 + 1a = -4 Add '-7' to each side of the equation. 7 + -7 + 1a = -4 + -7 Combine like terms: 7 + -7 = 0 0 + 1a = -4 + -7 1a = -4 + -7 Combine like terms: -4 + -7 = -11 1a = -11 Divide each side by '1'. a = -11 Simplifying a = -11
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