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Simplifying 1 + -6r + -1r = 22 Combine like terms: -6r + -1r = -7r 1 + -7r = 22 Solving 1 + -7r = 22 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -7r = 22 + -1 Combine like terms: 1 + -1 = 0 0 + -7r = 22 + -1 -7r = 22 + -1 Combine like terms: 22 + -1 = 21 -7r = 21 Divide each side by '-7'. r = -3 Simplifying r = -3
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