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Simplifying -8r + 28 = -2(-5r + 4) Reorder the terms: 28 + -8r = -2(-5r + 4) Reorder the terms: 28 + -8r = -2(4 + -5r) 28 + -8r = (4 * -2 + -5r * -2) 28 + -8r = (-8 + 10r) Solving 28 + -8r = -8 + 10r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-10r' to each side of the equation. 28 + -8r + -10r = -8 + 10r + -10r Combine like terms: -8r + -10r = -18r 28 + -18r = -8 + 10r + -10r Combine like terms: 10r + -10r = 0 28 + -18r = -8 + 0 28 + -18r = -8 Add '-28' to each side of the equation. 28 + -28 + -18r = -8 + -28 Combine like terms: 28 + -28 = 0 0 + -18r = -8 + -28 -18r = -8 + -28 Combine like terms: -8 + -28 = -36 -18r = -36 Divide each side by '-18'. r = 2 Simplifying r = 2
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