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Simplifying 2.7 = a + -12.9 Reorder the terms: 2.7 = -12.9 + a Solving 2.7 = -12.9 + 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. 2.7 + -1a = -12.9 + a + -1a Combine like terms: a + -1a = 0 2.7 + -1a = -12.9 + 0 2.7 + -1a = -12.9 Add '-2.7' to each side of the equation. 2.7 + -2.7 + -1a = -12.9 + -2.7 Combine like terms: 2.7 + -2.7 = 0.0 0.0 + -1a = -12.9 + -2.7 -1a = -12.9 + -2.7 Combine like terms: -12.9 + -2.7 = -15.6 -1a = -15.6 Divide each side by '-1'. a = 15.6 Simplifying a = 15.6
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