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