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Simplifying 20r + 70 + -8(4r + 6) = 0 Reorder the terms: 20r + 70 + -8(6 + 4r) = 0 20r + 70 + (6 * -8 + 4r * -8) = 0 20r + 70 + (-48 + -32r) = 0 Reorder the terms: 70 + -48 + 20r + -32r = 0 Combine like terms: 70 + -48 = 22 22 + 20r + -32r = 0 Combine like terms: 20r + -32r = -12r 22 + -12r = 0 Solving 22 + -12r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-22' to each side of the equation. 22 + -22 + -12r = 0 + -22 Combine like terms: 22 + -22 = 0 0 + -12r = 0 + -22 -12r = 0 + -22 Combine like terms: 0 + -22 = -22 -12r = -22 Divide each side by '-12'. r = 1.833333333 Simplifying r = 1.833333333
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