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Simplifying 2r + -4 = (6 + -7r) Reorder the terms: -4 + 2r = (6 + -7r) Remove parenthesis around (6 + -7r) -4 + 2r = 6 + -7r Solving -4 + 2r = 6 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. -4 + 2r + 7r = 6 + -7r + 7r Combine like terms: 2r + 7r = 9r -4 + 9r = 6 + -7r + 7r Combine like terms: -7r + 7r = 0 -4 + 9r = 6 + 0 -4 + 9r = 6 Add '4' to each side of the equation. -4 + 4 + 9r = 6 + 4 Combine like terms: -4 + 4 = 0 0 + 9r = 6 + 4 9r = 6 + 4 Combine like terms: 6 + 4 = 10 9r = 10 Divide each side by '9'. r = 1.111111111 Simplifying r = 1.111111111
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