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Simplifying 30 + -2r = 4r Solving 30 + -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. 30 + -2r + -4r = 4r + -4r Combine like terms: -2r + -4r = -6r 30 + -6r = 4r + -4r Combine like terms: 4r + -4r = 0 30 + -6r = 0 Add '-30' to each side of the equation. 30 + -30 + -6r = 0 + -30 Combine like terms: 30 + -30 = 0 0 + -6r = 0 + -30 -6r = 0 + -30 Combine like terms: 0 + -30 = -30 -6r = -30 Divide each side by '-6'. r = 5 Simplifying r = 5
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