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Simplifying 40a + 50b = 8400 Solving 40a + 50b = 8400 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-50b' to each side of the equation. 40a + 50b + -50b = 8400 + -50b Combine like terms: 50b + -50b = 0 40a + 0 = 8400 + -50b 40a = 8400 + -50b Divide each side by '40'. a = 210 + -1.25b Simplifying a = 210 + -1.25b
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