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Simplifying 55 + -2a = 7a Solving 55 + -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. 55 + -2a + -7a = 7a + -7a Combine like terms: -2a + -7a = -9a 55 + -9a = 7a + -7a Combine like terms: 7a + -7a = 0 55 + -9a = 0 Add '-55' to each side of the equation. 55 + -55 + -9a = 0 + -55 Combine like terms: 55 + -55 = 0 0 + -9a = 0 + -55 -9a = 0 + -55 Combine like terms: 0 + -55 = -55 -9a = -55 Divide each side by '-9'. a = 6.111111111 Simplifying a = 6.111111111
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