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Simplifying 2 = (-9)(9) + b Multiply -9 * 9 2 = -81 + b Solving 2 = -81 + 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. 2 + -1b = -81 + b + -1b Combine like terms: b + -1b = 0 2 + -1b = -81 + 0 2 + -1b = -81 Add '-2' to each side of the equation. 2 + -2 + -1b = -81 + -2 Combine like terms: 2 + -2 = 0 0 + -1b = -81 + -2 -1b = -81 + -2 Combine like terms: -81 + -2 = -83 -1b = -83 Divide each side by '-1'. b = 83 Simplifying b = 83
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