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Simplifying 70 = 2r + 10 Reorder the terms: 70 = 10 + 2r Solving 70 = 10 + 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. 70 + -2r = 10 + 2r + -2r Combine like terms: 2r + -2r = 0 70 + -2r = 10 + 0 70 + -2r = 10 Add '-70' to each side of the equation. 70 + -70 + -2r = 10 + -70 Combine like terms: 70 + -70 = 0 0 + -2r = 10 + -70 -2r = 10 + -70 Combine like terms: 10 + -70 = -60 -2r = -60 Divide each side by '-2'. r = 30 Simplifying r = 30
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