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Simplifying -3(1 + 6r) = -2 + -18r + -1 (1 * -3 + 6r * -3) = -2 + -18r + -1 (-3 + -18r) = -2 + -18r + -1 Reorder the terms: -3 + -18r = -2 + -1 + -18r Combine like terms: -2 + -1 = -3 -3 + -18r = -3 + -18r Add '3' to each side of the equation. -3 + 3 + -18r = -3 + 3 + -18r Combine like terms: -3 + 3 = 0 0 + -18r = -3 + 3 + -18r -18r = -3 + 3 + -18r Combine like terms: -3 + 3 = 0 -18r = 0 + -18r -18r = -18r Add '18r' to each side of the equation. -18r + 18r = -18r + 18r Combine like terms: -18r + 18r = 0 0 = -18r + 18r Combine like terms: -18r + 18r = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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