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Simplifying r + 7 = 3r Reorder the terms: 7 + r = 3r Solving 7 + r = 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 7 + r + -3r = 3r + -3r Combine like terms: r + -3r = -2r 7 + -2r = 3r + -3r Combine like terms: 3r + -3r = 0 7 + -2r = 0 Add '-7' to each side of the equation. 7 + -7 + -2r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2r = 0 + -7 -2r = 0 + -7 Combine like terms: 0 + -7 = -7 -2r = -7 Divide each side by '-2'. r = 3.5 Simplifying r = 3.5
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