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Simplifying 12 = 2a + 4 Reorder the terms: 12 = 4 + 2a Solving 12 = 4 + 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. 12 + -2a = 4 + 2a + -2a Combine like terms: 2a + -2a = 0 12 + -2a = 4 + 0 12 + -2a = 4 Add '-12' to each side of the equation. 12 + -12 + -2a = 4 + -12 Combine like terms: 12 + -12 = 0 0 + -2a = 4 + -12 -2a = 4 + -12 Combine like terms: 4 + -12 = -8 -2a = -8 Divide each side by '-2'. a = 4 Simplifying a = 4
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