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Simplifying 21a + 13y = 0 Solving 21a + 13y = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-13y' to each side of the equation. 21a + 13y + -13y = 0 + -13y Combine like terms: 13y + -13y = 0 21a + 0 = 0 + -13y 21a = 0 + -13y Remove the zero: 21a = -13y Divide each side by '21'. a = -0.619047619y Simplifying a = -0.619047619y
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