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Simplifying b + -7 + 2b = 13 Reorder the terms: -7 + b + 2b = 13 Combine like terms: b + 2b = 3b -7 + 3b = 13 Solving -7 + 3b = 13 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 3b = 13 + 7 Combine like terms: -7 + 7 = 0 0 + 3b = 13 + 7 3b = 13 + 7 Combine like terms: 13 + 7 = 20 3b = 20 Divide each side by '3'. b = 6.666666667 Simplifying b = 6.666666667
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