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Simplifying 2(0.4b) + -1(-3b) + -7(0.4b) + -5b = 0 Remove parenthesis around (0.4b) 2 * 0.4b + -1(-3b) + -7(0.4b) + -5b = 0 Multiply 2 * 0.4 0.8b + -1(-3b) + -7(0.4b) + -5b = 0 Remove parenthesis around (-3b) 0.8b + -1 * -3b + -7(0.4b) + -5b = 0 Multiply -1 * -3 0.8b + 3b + -7(0.4b) + -5b = 0 Remove parenthesis around (0.4b) 0.8b + 3b + -7 * 0.4b + -5b = 0 Multiply -7 * 0.4 0.8b + 3b + -2.8b + -5b = 0 Combine like terms: 0.8b + 3b = 3.8b 3.8b + -2.8b + -5b = 0 Combine like terms: 3.8b + -2.8b = 1b 1b + -5b = 0 Combine like terms: 1b + -5b = -4b -4b = 0 Solving -4b = 0 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Divide each side by '-4'. b = 0 Simplifying b = 0
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