Question

Help me solve the equation in red

Answer 1

The answer is l =
`(A - (1)/(2) \pi w^(2) )/(2w)`

In order to find that, follow the order of operations. There will only be two steps needed.

A =
`(1)/(2) \pi w^(2) + 2lw` ----> Subtract the first term

A -
`(1)/(2) \pi w^(2)` = 2lw -----> Divide by 2w

l =
`(A - (1)/(2) \pi w^(2) )/(2w)`