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Simplifying 20 + 4a = a + -2 Reorder the terms: 20 + 4a = -2 + a Solving 20 + 4a = -2 + 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. 20 + 4a + -1a = -2 + a + -1a Combine like terms: 4a + -1a = 3a 20 + 3a = -2 + a + -1a Combine like terms: a + -1a = 0 20 + 3a = -2 + 0 20 + 3a = -2 Add '-20' to each side of the equation. 20 + -20 + 3a = -2 + -20 Combine like terms: 20 + -20 = 0 0 + 3a = -2 + -20 3a = -2 + -20 Combine like terms: -2 + -20 = -22 3a = -22 Divide each side by '3'. a = -7.333333333 Simplifying a = -7.333333333
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