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Simplifying -5 = 0.25(4 + 20r) + -2x -5 = (4 * 0.25 + 20r * 0.25) + -2x -5 = (1 + 5r) + -2x Solving -5 = 1 + 5r + -2x Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. -5 + -5r = 1 + 5r + -5r + -2x Combine like terms: 5r + -5r = 0 -5 + -5r = 1 + 0 + -2x -5 + -5r = 1 + -2x Add '5' to each side of the equation. -5 + 5 + -5r = 1 + 5 + -2x Combine like terms: -5 + 5 = 0 0 + -5r = 1 + 5 + -2x -5r = 1 + 5 + -2x Combine like terms: 1 + 5 = 6 -5r = 6 + -2x Divide each side by '-5'. r = -1.2 + 0.4x Simplifying r = -1.2 + 0.4x
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