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Simplifying 3 = 7(1) + b Multiply 7 * 1 3 = 7 + b Solving 3 = 7 + 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 = 7 + b + -1b Combine like terms: b + -1b = 0 3 + -1b = 7 + 0 3 + -1b = 7 Add '-3' to each side of the equation. 3 + -3 + -1b = 7 + -3 Combine like terms: 3 + -3 = 0 0 + -1b = 7 + -3 -1b = 7 + -3 Combine like terms: 7 + -3 = 4 -1b = 4 Divide each side by '-1'. b = -4 Simplifying b = -4
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