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Simplifying 0 = -2(4y + -1a) + -1y Reorder the terms: 0 = -2(-1a + 4y) + -1y 0 = (-1a * -2 + 4y * -2) + -1y 0 = (2a + -8y) + -1y Combine like terms: -8y + -1y = -9y 0 = 2a + -9y Solving 0 = 2a + -9y 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. 0 + -2a = 2a + -2a + -9y Remove the zero: -2a = 2a + -2a + -9y Combine like terms: 2a + -2a = 0 -2a = 0 + -9y -2a = -9y Divide each side by '-2'. a = 4.5y Simplifying a = 4.5y
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