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Simplifying 21 + 6m = -4 + 6(m + 3) Reorder the terms: 21 + 6m = -4 + 6(3 + m) 21 + 6m = -4 + (3 * 6 + m * 6) 21 + 6m = -4 + (18 + 6m) Combine like terms: -4 + 18 = 14 21 + 6m = 14 + 6m Add '-6m' to each side of the equation. 21 + 6m + -6m = 14 + 6m + -6m Combine like terms: 6m + -6m = 0 21 + 0 = 14 + 6m + -6m 21 = 14 + 6m + -6m Combine like terms: 6m + -6m = 0 21 = 14 + 0 21 = 14 Solving 21 = 14 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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