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Simplifying -19 + 21b = 3(7b + -4) Reorder the terms: -19 + 21b = 3(-4 + 7b) -19 + 21b = (-4 * 3 + 7b * 3) -19 + 21b = (-12 + 21b) Add '-21b' to each side of the equation. -19 + 21b + -21b = -12 + 21b + -21b Combine like terms: 21b + -21b = 0 -19 + 0 = -12 + 21b + -21b -19 = -12 + 21b + -21b Combine like terms: 21b + -21b = 0 -19 = -12 + 0 -19 = -12 Solving -19 = -12 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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