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Simplifying 7 + r = 1 + 2r Solving 7 + r = 1 + 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. 7 + r + -2r = 1 + 2r + -2r Combine like terms: r + -2r = -1r 7 + -1r = 1 + 2r + -2r Combine like terms: 2r + -2r = 0 7 + -1r = 1 + 0 7 + -1r = 1 Add '-7' to each side of the equation. 7 + -7 + -1r = 1 + -7 Combine like terms: 7 + -7 = 0 0 + -1r = 1 + -7 -1r = 1 + -7 Combine like terms: 1 + -7 = -6 -1r = -6 Divide each side by '-1'. r = 6 Simplifying r = 6
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