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Simplifying 2a + -1 = 7a Reorder the terms: -1 + 2a = 7a Solving -1 + 2a = 7a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7a' to each side of the equation. -1 + 2a + -7a = 7a + -7a Combine like terms: 2a + -7a = -5a -1 + -5a = 7a + -7a Combine like terms: 7a + -7a = 0 -1 + -5a = 0 Add '1' to each side of the equation. -1 + 1 + -5a = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -5a = 0 + 1 -5a = 0 + 1 Combine like terms: 0 + 1 = 1 -5a = 1 Divide each side by '-5'. a = -0.2 Simplifying a = -0.2
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