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Simplifying 7r + -1(-4) = 10 + 2r Multiply -1 * -4 7r + 4 = 10 + 2r Reorder the terms: 4 + 7r = 10 + 2r Solving 4 + 7r = 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. 4 + 7r + -2r = 10 + 2r + -2r Combine like terms: 7r + -2r = 5r 4 + 5r = 10 + 2r + -2r Combine like terms: 2r + -2r = 0 4 + 5r = 10 + 0 4 + 5r = 10 Add '-4' to each side of the equation. 4 + -4 + 5r = 10 + -4 Combine like terms: 4 + -4 = 0 0 + 5r = 10 + -4 5r = 10 + -4 Combine like terms: 10 + -4 = 6 5r = 6 Divide each side by '5'. r = 1.2 Simplifying r = 1.2
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