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Simplifying -420 = 30(-2b) Remove parenthesis around (-2b) -420 = 30 * -2b Multiply 30 * -2 -420 = -60b Solving -420 = -60b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '60b' to each side of the equation. -420 + 60b = -60b + 60b Combine like terms: -60b + 60b = 0 -420 + 60b = 0 Add '420' to each side of the equation. -420 + 420 + 60b = 0 + 420 Combine like terms: -420 + 420 = 0 0 + 60b = 0 + 420 60b = 0 + 420 Combine like terms: 0 + 420 = 420 60b = 420 Divide each side by '60'. b = 7 Simplifying b = 7
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