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Simplifying 2m + -21 + -8m = -3(2m + 7) Reorder the terms: -21 + 2m + -8m = -3(2m + 7) Combine like terms: 2m + -8m = -6m -21 + -6m = -3(2m + 7) Reorder the terms: -21 + -6m = -3(7 + 2m) -21 + -6m = (7 * -3 + 2m * -3) -21 + -6m = (-21 + -6m) Add '21' to each side of the equation. -21 + 21 + -6m = -21 + 21 + -6m Combine like terms: -21 + 21 = 0 0 + -6m = -21 + 21 + -6m -6m = -21 + 21 + -6m Combine like terms: -21 + 21 = 0 -6m = 0 + -6m -6m = -6m Add '6m' to each side of the equation. -6m + 6m = -6m + 6m Combine like terms: -6m + 6m = 0 0 = -6m + 6m Combine like terms: -6m + 6m = 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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