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Simplifying (4r + -1) = r + 19 Reorder the terms: (-1 + 4r) = r + 19 Remove parenthesis around (-1 + 4r) -1 + 4r = r + 19 Reorder the terms: -1 + 4r = 19 + r Solving -1 + 4r = 19 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -1 + 4r + -1r = 19 + r + -1r Combine like terms: 4r + -1r = 3r -1 + 3r = 19 + r + -1r Combine like terms: r + -1r = 0 -1 + 3r = 19 + 0 -1 + 3r = 19 Add '1' to each side of the equation. -1 + 1 + 3r = 19 + 1 Combine like terms: -1 + 1 = 0 0 + 3r = 19 + 1 3r = 19 + 1 Combine like terms: 19 + 1 = 20 3r = 20 Divide each side by '3'. r = 6.666666667 Simplifying r = 6.666666667
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