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Simplifying 7 + -2r = -2r + 4r Combine like terms: -2r + 4r = 2r 7 + -2r = 2r Solving 7 + -2r = 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 7 + -2r + -2r = 2r + -2r Combine like terms: -2r + -2r = -4r 7 + -4r = 2r + -2r Combine like terms: 2r + -2r = 0 7 + -4r = 0 Add '-7' to each side of the equation. 7 + -7 + -4r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -4r = 0 + -7 -4r = 0 + -7 Combine like terms: 0 + -7 = -7 -4r = -7 Divide each side by '-4'. r = 1.75 Simplifying r = 1.75
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