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Simplifying 7 + -3r = 9r + -11 Reorder the terms: 7 + -3r = -11 + 9r Solving 7 + -3r = -11 + 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. 7 + -3r + -9r = -11 + 9r + -9r Combine like terms: -3r + -9r = -12r 7 + -12r = -11 + 9r + -9r Combine like terms: 9r + -9r = 0 7 + -12r = -11 + 0 7 + -12r = -11 Add '-7' to each side of the equation. 7 + -7 + -12r = -11 + -7 Combine like terms: 7 + -7 = 0 0 + -12r = -11 + -7 -12r = -11 + -7 Combine like terms: -11 + -7 = -18 -12r = -18 Divide each side by '-12'. r = 1.5 Simplifying r = 1.5
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