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Simplifying 15a + -21b = 0 Solving 15a + -21b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '21b' to each side of the equation. 15a + -21b + 21b = 0 + 21b Combine like terms: -21b + 21b = 0 15a + 0 = 0 + 21b 15a = 0 + 21b Remove the zero: 15a = 21b Divide each side by '15'. a = 1.4b Simplifying a = 1.4b
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