Respuesta :

If you're trying to isolate b, then you can do the following:

P=2a+b
P-2a=b
b=P-2a

But I'm not sure if that's what it is asking you to do.
CmdrWinters
In order to make b the subject of this equation, we must isolate it on the left side. We can do this by following these steps:

[tex]P = 2a+b[/tex]

Subtract b from both sides

[tex]P - b = 2a+b-b[/tex]

[tex]P-b=2a[/tex]

Subtract P from both sides

[tex]P-b-P=2a-P[/tex]

[tex]-b=2a-P[/tex]

Now, we have isolated b, but it is negative. We can fix this by multiplying both sides of the equation by -1.

[tex]-(-b)=-(2a-P)[/tex]

[tex]b=-2a+P[/tex]

Which is your final answer.
[tex]b = -2a+P[/tex].
Hope that helped! =)

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