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Simplifying -4a + 7 = -7a + -20 Reorder the terms: 7 + -4a = -7a + -20 Reorder the terms: 7 + -4a = -20 + -7a Solving 7 + -4a = -20 + -7a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '7a' to each side of the equation. 7 + -4a + 7a = -20 + -7a + 7a Combine like terms: -4a + 7a = 3a 7 + 3a = -20 + -7a + 7a Combine like terms: -7a + 7a = 0 7 + 3a = -20 + 0 7 + 3a = -20 Add '-7' to each side of the equation. 7 + -7 + 3a = -20 + -7 Combine like terms: 7 + -7 = 0 0 + 3a = -20 + -7 3a = -20 + -7 Combine like terms: -20 + -7 = -27 3a = -27 Divide each side by '3'. a = -9 Simplifying a = -9
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