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Simplifying 7(7b + -4) = -420 Reorder the terms: 7(-4 + 7b) = -420 (-4 * 7 + 7b * 7) = -420 (-28 + 49b) = -420 Solving -28 + 49b = -420 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + 49b = -420 + 28 Combine like terms: -28 + 28 = 0 0 + 49b = -420 + 28 49b = -420 + 28 Combine like terms: -420 + 28 = -392 49b = -392 Divide each side by '49'. b = -8 Simplifying b = -8
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