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Simplifying 7r + 3 = 3(r + -1) Reorder the terms: 3 + 7r = 3(r + -1) Reorder the terms: 3 + 7r = 3(-1 + r) 3 + 7r = (-1 * 3 + r * 3) 3 + 7r = (-3 + 3r) Solving 3 + 7r = -3 + 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. 3 + 7r + -3r = -3 + 3r + -3r Combine like terms: 7r + -3r = 4r 3 + 4r = -3 + 3r + -3r Combine like terms: 3r + -3r = 0 3 + 4r = -3 + 0 3 + 4r = -3 Add '-3' to each side of the equation. 3 + -3 + 4r = -3 + -3 Combine like terms: 3 + -3 = 0 0 + 4r = -3 + -3 4r = -3 + -3 Combine like terms: -3 + -3 = -6 4r = -6 Divide each side by '4'. r = -1.5 Simplifying r = -1.5
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