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Simplifying 18 + -3r = -3(6r + -6) Reorder the terms: 18 + -3r = -3(-6 + 6r) 18 + -3r = (-6 * -3 + 6r * -3) 18 + -3r = (18 + -18r) Add '-18' to each side of the equation. 18 + -18 + -3r = 18 + -18 + -18r Combine like terms: 18 + -18 = 0 0 + -3r = 18 + -18 + -18r -3r = 18 + -18 + -18r Combine like terms: 18 + -18 = 0 -3r = 0 + -18r -3r = -18r Solving -3r = -18r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '18r' to each side of the equation. -3r + 18r = -18r + 18r Combine like terms: -3r + 18r = 15r 15r = -18r + 18r Combine like terms: -18r + 18r = 0 15r = 0 Divide each side by '15'. r = 0 Simplifying r = 0
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