Answer:
Equation (B) and (C) are equal to 0.5+10b+4=19.5
As in equation (B) when we take the 0.5 on the other side, the sign will change.Then the equation will be 10b+4=19.5-0.5
Which equals : 10b+4=19
In equation (C) 2(0.5+10b+4)=39
The 2 which is being multiplied to the bracket equation will be canceled out when we divide it , and will be divided on the other side as well so 39÷2=19.5
So the equation will become 0.5+10b+4=19.5
