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Simplifying 40 + 3a = -12a + 20 Reorder the terms: 40 + 3a = 20 + -12a Solving 40 + 3a = 20 + -12a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '12a' to each side of the equation. 40 + 3a + 12a = 20 + -12a + 12a Combine like terms: 3a + 12a = 15a 40 + 15a = 20 + -12a + 12a Combine like terms: -12a + 12a = 0 40 + 15a = 20 + 0 40 + 15a = 20 Add '-40' to each side of the equation. 40 + -40 + 15a = 20 + -40 Combine like terms: 40 + -40 = 0 0 + 15a = 20 + -40 15a = 20 + -40 Combine like terms: 20 + -40 = -20 15a = -20 Divide each side by '15'. a = -1.333333333 Simplifying a = -1.333333333
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