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Simplifying -15d + -12 = -4(d + 3) + -11d Reorder the terms: -12 + -15d = -4(d + 3) + -11d Reorder the terms: -12 + -15d = -4(3 + d) + -11d -12 + -15d = (3 * -4 + d * -4) + -11d -12 + -15d = (-12 + -4d) + -11d Combine like terms: -4d + -11d = -15d -12 + -15d = -12 + -15d Add '12' to each side of the equation. -12 + 12 + -15d = -12 + 12 + -15d Combine like terms: -12 + 12 = 0 0 + -15d = -12 + 12 + -15d -15d = -12 + 12 + -15d Combine like terms: -12 + 12 = 0 -15d = 0 + -15d -15d = -15d Add '15d' to each side of the equation. -15d + 15d = -15d + 15d Combine like terms: -15d + 15d = 0 0 = -15d + 15d Combine like terms: -15d + 15d = 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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