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Simplifying 3 = 7 + 2a Solving 3 = 7 + 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. 3 + -2a = 7 + 2a + -2a Combine like terms: 2a + -2a = 0 3 + -2a = 7 + 0 3 + -2a = 7 Add '-3' to each side of the equation. 3 + -3 + -2a = 7 + -3 Combine like terms: 3 + -3 = 0 0 + -2a = 7 + -3 -2a = 7 + -3 Combine like terms: 7 + -3 = 4 -2a = 4 Divide each side by '-2'. a = -2 Simplifying a = -2
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