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