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Simplifying 15w + 21 = 3(5w + -7) Reorder the terms: 21 + 15w = 3(5w + -7) Reorder the terms: 21 + 15w = 3(-7 + 5w) 21 + 15w = (-7 * 3 + 5w * 3) 21 + 15w = (-21 + 15w) Add '-15w' to each side of the equation. 21 + 15w + -15w = -21 + 15w + -15w Combine like terms: 15w + -15w = 0 21 + 0 = -21 + 15w + -15w 21 = -21 + 15w + -15w Combine like terms: 15w + -15w = 0 21 = -21 + 0 21 = -21 Solving 21 = -21 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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