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Simplifying 18 + -2r = 4r Solving 18 + -2r = 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. 18 + -2r + -4r = 4r + -4r Combine like terms: -2r + -4r = -6r 18 + -6r = 4r + -4r Combine like terms: 4r + -4r = 0 18 + -6r = 0 Add '-18' to each side of the equation. 18 + -18 + -6r = 0 + -18 Combine like terms: 18 + -18 = 0 0 + -6r = 0 + -18 -6r = 0 + -18 Combine like terms: 0 + -18 = -18 -6r = -18 Divide each side by '-6'. r = 3 Simplifying r = 3
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