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Simplifying 2 = 4r + -5r Combine like terms: 4r + -5r = -1r 2 = -1r Solving 2 = -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. 2 + r = -1r + r Combine like terms: -1r + r = 0 2 + r = 0 Add '-2' to each side of the equation. 2 + -2 + r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + r = 0 + -2 r = 0 + -2 Combine like terms: 0 + -2 = -2 r = -2 Simplifying r = -2
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