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Simplifying 7 + -1(2b) = 12 Remove parenthesis around (2b) 7 + -1 * 2b = 12 Multiply -1 * 2 7 + -2b = 12 Solving 7 + -2b = 12 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2b = 12 + -7 Combine like terms: 7 + -7 = 0 0 + -2b = 12 + -7 -2b = 12 + -7 Combine like terms: 12 + -7 = 5 -2b = 5 Divide each side by '-2'. b = -2.5 Simplifying b = -2.5
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