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Simplifying a + a + 7 + 2a + b = 68 Reorder the terms: 7 + a + a + 2a + b = 68 Combine like terms: a + a = 2a 7 + 2a + 2a + b = 68 Combine like terms: 2a + 2a = 4a 7 + 4a + b = 68 Solving 7 + 4a + b = 68 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + 4a + -7 + b = 68 + -7 Reorder the terms: 7 + -7 + 4a + b = 68 + -7 Combine like terms: 7 + -7 = 0 0 + 4a + b = 68 + -7 4a + b = 68 + -7 Combine like terms: 68 + -7 = 61 4a + b = 61 Add '-1b' to each side of the equation. 4a + b + -1b = 61 + -1b Combine like terms: b + -1b = 0 4a + 0 = 61 + -1b 4a = 61 + -1b Divide each side by '4'. a = 15.25 + -0.25b Simplifying a = 15.25 + -0.25b
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