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Simplifying 7a + -1b = -15 Solving 7a + -1b = -15 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add 'b' to each side of the equation. 7a + -1b + b = -15 + b Combine like terms: -1b + b = 0 7a + 0 = -15 + b 7a = -15 + b Divide each side by '7'. a = -2.142857143 + 0.1428571429b Simplifying a = -2.142857143 + 0.1428571429b
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