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Simplifying -21 = 0.42R Solving -21 = 0.42R Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '-0.42R' to each side of the equation. -21 + -0.42R = 0.42R + -0.42R Combine like terms: 0.42R + -0.42R = 0.00 -21 + -0.42R = 0.00 Add '21' to each side of the equation. -21 + 21 + -0.42R = 0.00 + 21 Combine like terms: -21 + 21 = 0 0 + -0.42R = 0.00 + 21 -0.42R = 0.00 + 21 Combine like terms: 0.00 + 21 = 21 -0.42R = 21 Divide each side by '-0.42'. R = -50 Simplifying R = -50
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