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Simplifying 21 = 0.75a Solving 21 = 0.75a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.75a' to each side of the equation. 21 + -0.75a = 0.75a + -0.75a Combine like terms: 0.75a + -0.75a = 0.00 21 + -0.75a = 0.00 Add '-21' to each side of the equation. 21 + -21 + -0.75a = 0.00 + -21 Combine like terms: 21 + -21 = 0 0 + -0.75a = 0.00 + -21 -0.75a = 0.00 + -21 Combine like terms: 0.00 + -21 = -21 -0.75a = -21 Divide each side by '-0.75'. a = 28 Simplifying a = 28
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