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Simplifying 10r + -141 = 13r + -189 Reorder the terms: -141 + 10r = 13r + -189 Reorder the terms: -141 + 10r = -189 + 13r Solving -141 + 10r = -189 + 13r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-13r' to each side of the equation. -141 + 10r + -13r = -189 + 13r + -13r Combine like terms: 10r + -13r = -3r -141 + -3r = -189 + 13r + -13r Combine like terms: 13r + -13r = 0 -141 + -3r = -189 + 0 -141 + -3r = -189 Add '141' to each side of the equation. -141 + 141 + -3r = -189 + 141 Combine like terms: -141 + 141 = 0 0 + -3r = -189 + 141 -3r = -189 + 141 Combine like terms: -189 + 141 = -48 -3r = -48 Divide each side by '-3'. r = 16 Simplifying r = 16
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