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Simplifying -4(-7 + 3r) = -26 + 6r (-7 * -4 + 3r * -4) = -26 + 6r (28 + -12r) = -26 + 6r Solving 28 + -12r = -26 + 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. 28 + -12r + -6r = -26 + 6r + -6r Combine like terms: -12r + -6r = -18r 28 + -18r = -26 + 6r + -6r Combine like terms: 6r + -6r = 0 28 + -18r = -26 + 0 28 + -18r = -26 Add '-28' to each side of the equation. 28 + -28 + -18r = -26 + -28 Combine like terms: 28 + -28 = 0 0 + -18r = -26 + -28 -18r = -26 + -28 Combine like terms: -26 + -28 = -54 -18r = -54 Divide each side by '-18'. r = 3 Simplifying r = 3
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