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Simplifying -7 + a = 2 + -2a Solving -7 + a = 2 + -2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2a' to each side of the equation. -7 + a + 2a = 2 + -2a + 2a Combine like terms: a + 2a = 3a -7 + 3a = 2 + -2a + 2a Combine like terms: -2a + 2a = 0 -7 + 3a = 2 + 0 -7 + 3a = 2 Add '7' to each side of the equation. -7 + 7 + 3a = 2 + 7 Combine like terms: -7 + 7 = 0 0 + 3a = 2 + 7 3a = 2 + 7 Combine like terms: 2 + 7 = 9 3a = 9 Divide each side by '3'. a = 3 Simplifying a = 3
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