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Simplifying 18r + -1(8x + -7) = 67 Reorder the terms: 18r + -1(-7 + 8x) = 67 18r + (-7 * -1 + 8x * -1) = 67 18r + (7 + -8x) = 67 Reorder the terms: 7 + 18r + -8x = 67 Solving 7 + 18r + -8x = 67 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + 18r + -7 + -8x = 67 + -7 Reorder the terms: 7 + -7 + 18r + -8x = 67 + -7 Combine like terms: 7 + -7 = 0 0 + 18r + -8x = 67 + -7 18r + -8x = 67 + -7 Combine like terms: 67 + -7 = 60 18r + -8x = 60 Add '8x' to each side of the equation. 18r + -8x + 8x = 60 + 8x Combine like terms: -8x + 8x = 0 18r + 0 = 60 + 8x 18r = 60 + 8x Divide each side by '18'. r = 3.333333333 + 0.4444444444x Simplifying r = 3.333333333 + 0.4444444444x
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