4 b : ( 1 - 0,2 ) = 10
Solve for b
b=2
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\frac{4b}{0,8}=10
Subtract 0,2 from 1 to get 0,8.
5b=10
Divide 4b by 0,8 to get 5b.
b=\frac{10}{5}
Divide both sides by 5.
b=2
Divide 10 by 5 to get 2.
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