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Simplifying 8 + -3a + 12 = 12a Reorder the terms: 8 + 12 + -3a = 12a Combine like terms: 8 + 12 = 20 20 + -3a = 12a Solving 20 + -3a = 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. 20 + -3a + -12a = 12a + -12a Combine like terms: -3a + -12a = -15a 20 + -15a = 12a + -12a Combine like terms: 12a + -12a = 0 20 + -15a = 0 Add '-20' to each side of the equation. 20 + -20 + -15a = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -15a = 0 + -20 -15a = 0 + -20 Combine like terms: 0 + -20 = -20 -15a = -20 Divide each side by '-15'. a = 1.333333333 Simplifying a = 1.333333333
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