Question

Как решить 5b-(1-b)=4b

Answer 1

5B - 1 + B = 4B 
6B - 4B = 1 
2B = 1 
B = 0,5

Answer 2

5b-(1-b) = 4b
5b-1+b = 4b
5b+b-4b=1
2b=1
b=1:2
b=0.5