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Simplifying -2 = 28 + -2b + (-7) -2 = 28 + -2b + -7 Reorder the terms: -2 = 28 + -7 + -2b Combine like terms: 28 + -7 = 21 -2 = 21 + -2b Solving -2 = 21 + -2b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2b' to each side of the equation. -2 + 2b = 21 + -2b + 2b Combine like terms: -2b + 2b = 0 -2 + 2b = 21 + 0 -2 + 2b = 21 Add '2' to each side of the equation. -2 + 2 + 2b = 21 + 2 Combine like terms: -2 + 2 = 0 0 + 2b = 21 + 2 2b = 21 + 2 Combine like terms: 21 + 2 = 23 2b = 23 Divide each side by '2'. b = 11.5 Simplifying b = 11.5
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