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Simplifying 215 = 3a + d + -5 Reorder the terms: 215 = -5 + 3a + d Solving 215 = -5 + 3a + d Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3a' to each side of the equation. 215 + -3a = -5 + 3a + -3a + d Combine like terms: 3a + -3a = 0 215 + -3a = -5 + 0 + d 215 + -3a = -5 + d Add '-215' to each side of the equation. 215 + -215 + -3a = -5 + -215 + d Combine like terms: 215 + -215 = 0 0 + -3a = -5 + -215 + d -3a = -5 + -215 + d Combine like terms: -5 + -215 = -220 -3a = -220 + d Divide each side by '-3'. a = 73.33333333 + -0.3333333333d Simplifying a = 73.33333333 + -0.3333333333d
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