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Simplifying 45 = 3(21 + -1b) + 3(b + -2) 45 = (21 * 3 + -1b * 3) + 3(b + -2) 45 = (63 + -3b) + 3(b + -2) Reorder the terms: 45 = 63 + -3b + 3(-2 + b) 45 = 63 + -3b + (-2 * 3 + b * 3) 45 = 63 + -3b + (-6 + 3b) Reorder the terms: 45 = 63 + -6 + -3b + 3b Combine like terms: 63 + -6 = 57 45 = 57 + -3b + 3b Combine like terms: -3b + 3b = 0 45 = 57 + 0 45 = 57 Solving 45 = 57 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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