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Simplifying -22 + 7r = 3(2 + 7r) -22 + 7r = (2 * 3 + 7r * 3) -22 + 7r = (6 + 21r) Solving -22 + 7r = 6 + 21r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-21r' to each side of the equation. -22 + 7r + -21r = 6 + 21r + -21r Combine like terms: 7r + -21r = -14r -22 + -14r = 6 + 21r + -21r Combine like terms: 21r + -21r = 0 -22 + -14r = 6 + 0 -22 + -14r = 6 Add '22' to each side of the equation. -22 + 22 + -14r = 6 + 22 Combine like terms: -22 + 22 = 0 0 + -14r = 6 + 22 -14r = 6 + 22 Combine like terms: 6 + 22 = 28 -14r = 28 Divide each side by '-14'. r = -2 Simplifying r = -2
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