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Simplifying 98 = 7(4 + 2r) 98 = (4 * 7 + 2r * 7) 98 = (28 + 14r) Solving 98 = 28 + 14r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-14r' to each side of the equation. 98 + -14r = 28 + 14r + -14r Combine like terms: 14r + -14r = 0 98 + -14r = 28 + 0 98 + -14r = 28 Add '-98' to each side of the equation. 98 + -98 + -14r = 28 + -98 Combine like terms: 98 + -98 = 0 0 + -14r = 28 + -98 -14r = 28 + -98 Combine like terms: 28 + -98 = -70 -14r = -70 Divide each side by '-14'. r = 5 Simplifying r = 5
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