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Simplifying -2r + 5 = 4(2r + -5r) Reorder the terms: 5 + -2r = 4(2r + -5r) Combine like terms: 2r + -5r = -3r 5 + -2r = 4(-3r) Remove parenthesis around (-3r) 5 + -2r = 4 * -3r Multiply 4 * -3 5 + -2r = -12r Solving 5 + -2r = -12r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '12r' to each side of the equation. 5 + -2r + 12r = -12r + 12r Combine like terms: -2r + 12r = 10r 5 + 10r = -12r + 12r Combine like terms: -12r + 12r = 0 5 + 10r = 0 Add '-5' to each side of the equation. 5 + -5 + 10r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 10r = 0 + -5 10r = 0 + -5 Combine like terms: 0 + -5 = -5 10r = -5 Divide each side by '10'. r = -0.5 Simplifying r = -0.5
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