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Simplifying 3(r + -1) + 3(r + 5) = 6(r + -1) + 18 Reorder the terms: 3(-1 + r) + 3(r + 5) = 6(r + -1) + 18 (-1 * 3 + r * 3) + 3(r + 5) = 6(r + -1) + 18 (-3 + 3r) + 3(r + 5) = 6(r + -1) + 18 Reorder the terms: -3 + 3r + 3(5 + r) = 6(r + -1) + 18 -3 + 3r + (5 * 3 + r * 3) = 6(r + -1) + 18 -3 + 3r + (15 + 3r) = 6(r + -1) + 18 Reorder the terms: -3 + 15 + 3r + 3r = 6(r + -1) + 18 Combine like terms: -3 + 15 = 12 12 + 3r + 3r = 6(r + -1) + 18 Combine like terms: 3r + 3r = 6r 12 + 6r = 6(r + -1) + 18 Reorder the terms: 12 + 6r = 6(-1 + r) + 18 12 + 6r = (-1 * 6 + r * 6) + 18 12 + 6r = (-6 + 6r) + 18 Reorder the terms: 12 + 6r = -6 + 18 + 6r Combine like terms: -6 + 18 = 12 12 + 6r = 12 + 6r Add '-12' to each side of the equation. 12 + -12 + 6r = 12 + -12 + 6r Combine like terms: 12 + -12 = 0 0 + 6r = 12 + -12 + 6r 6r = 12 + -12 + 6r Combine like terms: 12 + -12 = 0 6r = 0 + 6r 6r = 6r Add '-6r' to each side of the equation. 6r + -6r = 6r + -6r Combine like terms: 6r + -6r = 0 0 = 6r + -6r Combine like terms: 6r + -6r = 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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