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Simplifying 1 + r = 7 + 2r Solving 1 + r = 7 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 1 + r + -2r = 7 + 2r + -2r Combine like terms: r + -2r = -1r 1 + -1r = 7 + 2r + -2r Combine like terms: 2r + -2r = 0 1 + -1r = 7 + 0 1 + -1r = 7 Add '-1' to each side of the equation. 1 + -1 + -1r = 7 + -1 Combine like terms: 1 + -1 = 0 0 + -1r = 7 + -1 -1r = 7 + -1 Combine like terms: 7 + -1 = 6 -1r = 6 Divide each side by '-1'. r = -6 Simplifying r = -6
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