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Simplifying 21a + -4b = 0 Solving 21a + -4b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4b' to each side of the equation. 21a + -4b + 4b = 0 + 4b Combine like terms: -4b + 4b = 0 21a + 0 = 0 + 4b 21a = 0 + 4b Remove the zero: 21a = 4b Divide each side by '21'. a = 0.1904761905b Simplifying a = 0.1904761905b
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