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Simplifying 3 = -4(7) + b Multiply -4 * 7 3 = -28 + b Solving 3 = -28 + b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1b' to each side of the equation. 3 + -1b = -28 + b + -1b Combine like terms: b + -1b = 0 3 + -1b = -28 + 0 3 + -1b = -28 Add '-3' to each side of the equation. 3 + -3 + -1b = -28 + -3 Combine like terms: 3 + -3 = 0 0 + -1b = -28 + -3 -1b = -28 + -3 Combine like terms: -28 + -3 = -31 -1b = -31 Divide each side by '-1'. b = 31 Simplifying b = 31
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