Question

A=a+b/2; Solve for b. Please explain :)

Answer 1

Is the equation \[\Large A = \frac{a+b}{2}\] OR is it\[\Large A = a+\frac{b}{2}\] ???

Answer 2

It's the first one

Answer 3

ok thanks

Answer 4

We want to isolate b, so we need to move everything but b over to the left side

Answer 5

So we start off by moving that '2' over. We do this by multiplying both sides by 2.


\[\Large A = \frac{a+b}{2}\]

\[\Large 2A = \cancel{2}\frac{a+b}{\cancel{2}} ... \ \text{Multiply both sides by 2}\]

\[\Large 2A = a+b ... \ \text{Simplify}\]

Do you see where to go from here?

Answer 6

Yes, I do. Thanks so much, I understand :)

Answer 7

that's great, yw