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Simplifying 2b + 3(b + -7) = 77 Reorder the terms: 2b + 3(-7 + b) = 77 2b + (-7 * 3 + b * 3) = 77 2b + (-21 + 3b) = 77 Reorder the terms: -21 + 2b + 3b = 77 Combine like terms: 2b + 3b = 5b -21 + 5b = 77 Solving -21 + 5b = 77 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 5b = 77 + 21 Combine like terms: -21 + 21 = 0 0 + 5b = 77 + 21 5b = 77 + 21 Combine like terms: 77 + 21 = 98 5b = 98 Divide each side by '5'. b = 19.6 Simplifying b = 19.6
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