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Simplifying 150 + 2r = 195 + -1r Solving 150 + 2r = 195 + -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. 150 + 2r + r = 195 + -1r + r Combine like terms: 2r + r = 3r 150 + 3r = 195 + -1r + r Combine like terms: -1r + r = 0 150 + 3r = 195 + 0 150 + 3r = 195 Add '-150' to each side of the equation. 150 + -150 + 3r = 195 + -150 Combine like terms: 150 + -150 = 0 0 + 3r = 195 + -150 3r = 195 + -150 Combine like terms: 195 + -150 = 45 3r = 45 Divide each side by '3'. r = 15 Simplifying r = 15
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