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Simplifying 2a + -5a + -8 = 7 Reorder the terms: -8 + 2a + -5a = 7 Combine like terms: 2a + -5a = -3a -8 + -3a = 7 Solving -8 + -3a = 7 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -3a = 7 + 8 Combine like terms: -8 + 8 = 0 0 + -3a = 7 + 8 -3a = 7 + 8 Combine like terms: 7 + 8 = 15 -3a = 15 Divide each side by '-3'. a = -5 Simplifying a = -5
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