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Simplifying 12 + -4a = 3a Solving 12 + -4a = 3a 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. 12 + -4a + -3a = 3a + -3a Combine like terms: -4a + -3a = -7a 12 + -7a = 3a + -3a Combine like terms: 3a + -3a = 0 12 + -7a = 0 Add '-12' to each side of the equation. 12 + -12 + -7a = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -7a = 0 + -12 -7a = 0 + -12 Combine like terms: 0 + -12 = -12 -7a = -12 Divide each side by '-7'. a = 1.714285714 Simplifying a = 1.714285714
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