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Simplifying -2(u + 6) + 6u = 4(u + -3) Reorder the terms: -2(6 + u) + 6u = 4(u + -3) (6 * -2 + u * -2) + 6u = 4(u + -3) (-12 + -2u) + 6u = 4(u + -3) Combine like terms: -2u + 6u = 4u -12 + 4u = 4(u + -3) Reorder the terms: -12 + 4u = 4(-3 + u) -12 + 4u = (-3 * 4 + u * 4) -12 + 4u = (-12 + 4u) Add '12' to each side of the equation. -12 + 12 + 4u = -12 + 12 + 4u Combine like terms: -12 + 12 = 0 0 + 4u = -12 + 12 + 4u 4u = -12 + 12 + 4u Combine like terms: -12 + 12 = 0 4u = 0 + 4u 4u = 4u Add '-4u' to each side of the equation. 4u + -4u = 4u + -4u Combine like terms: 4u + -4u = 0 0 = 4u + -4u Combine like terms: 4u + -4u = 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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