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Simplifying 2r + -4 = -10 + 9r Reorder the terms: -4 + 2r = -10 + 9r Solving -4 + 2r = -10 + 9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9r' to each side of the equation. -4 + 2r + -9r = -10 + 9r + -9r Combine like terms: 2r + -9r = -7r -4 + -7r = -10 + 9r + -9r Combine like terms: 9r + -9r = 0 -4 + -7r = -10 + 0 -4 + -7r = -10 Add '4' to each side of the equation. -4 + 4 + -7r = -10 + 4 Combine like terms: -4 + 4 = 0 0 + -7r = -10 + 4 -7r = -10 + 4 Combine like terms: -10 + 4 = -6 -7r = -6 Divide each side by '-7'. r = 0.8571428571 Simplifying r = 0.8571428571
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