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Simplifying -2b = 28 + -2b + (-7) -2b = 28 + -2b + -7 Reorder the terms: -2b = 28 + -7 + -2b Combine like terms: 28 + -7 = 21 -2b = 21 + -2b Add '2b' to each side of the equation. -2b + 2b = 21 + -2b + 2b Combine like terms: -2b + 2b = 0 0 = 21 + -2b + 2b Combine like terms: -2b + 2b = 0 0 = 21 + 0 0 = 21 Solving 0 = 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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