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Simplifying a + -315 = 312 + -12a Reorder the terms: -315 + a = 312 + -12a Solving -315 + a = 312 + -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. -315 + a + 12a = 312 + -12a + 12a Combine like terms: a + 12a = 13a -315 + 13a = 312 + -12a + 12a Combine like terms: -12a + 12a = 0 -315 + 13a = 312 + 0 -315 + 13a = 312 Add '315' to each side of the equation. -315 + 315 + 13a = 312 + 315 Combine like terms: -315 + 315 = 0 0 + 13a = 312 + 315 13a = 312 + 315 Combine like terms: 312 + 315 = 627 13a = 627 Divide each side by '13'. a = 48.23076923 Simplifying a = 48.23076923
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