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Simplifying 4 + -2r = 4 Add '-4' to each side of the equation. 4 + -4 + -2r = 4 + -4 Combine like terms: 4 + -4 = 0 0 + -2r = 4 + -4 -2r = 4 + -4 Combine like terms: 4 + -4 = 0 -2r = 0 Solving -2r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '-2'. r = 0 Simplifying r = 0
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