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Simplifying -13c + 51c = -21 Combine like terms: -13c + 51c = 38c 38c = -21 Solving 38c = -21 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '38'. c = -0.5526315789 Simplifying c = -0.5526315789
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