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Simplifying 2r + -6 = -55 + 9r Reorder the terms: -6 + 2r = -55 + 9r Solving -6 + 2r = -55 + 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. -6 + 2r + -9r = -55 + 9r + -9r Combine like terms: 2r + -9r = -7r -6 + -7r = -55 + 9r + -9r Combine like terms: 9r + -9r = 0 -6 + -7r = -55 + 0 -6 + -7r = -55 Add '6' to each side of the equation. -6 + 6 + -7r = -55 + 6 Combine like terms: -6 + 6 = 0 0 + -7r = -55 + 6 -7r = -55 + 6 Combine like terms: -55 + 6 = -49 -7r = -49 Divide each side by '-7'. r = 7 Simplifying r = 7
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