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Simplifying -31 = a + 7 Reorder the terms: -31 = 7 + a Solving -31 = 7 + 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. -31 + -1a = 7 + a + -1a Combine like terms: a + -1a = 0 -31 + -1a = 7 + 0 -31 + -1a = 7 Add '31' to each side of the equation. -31 + 31 + -1a = 7 + 31 Combine like terms: -31 + 31 = 0 0 + -1a = 7 + 31 -1a = 7 + 31 Combine like terms: 7 + 31 = 38 -1a = 38 Divide each side by '-1'. a = -38 Simplifying a = -38
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