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Simplifying 7a + -4 + 2a = 2a + -2 Reorder the terms: -4 + 7a + 2a = 2a + -2 Combine like terms: 7a + 2a = 9a -4 + 9a = 2a + -2 Reorder the terms: -4 + 9a = -2 + 2a Solving -4 + 9a = -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. -4 + 9a + -2a = -2 + 2a + -2a Combine like terms: 9a + -2a = 7a -4 + 7a = -2 + 2a + -2a Combine like terms: 2a + -2a = 0 -4 + 7a = -2 + 0 -4 + 7a = -2 Add '4' to each side of the equation. -4 + 4 + 7a = -2 + 4 Combine like terms: -4 + 4 = 0 0 + 7a = -2 + 4 7a = -2 + 4 Combine like terms: -2 + 4 = 2 7a = 2 Divide each side by '7'. a = 0.2857142857 Simplifying a = 0.2857142857
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