Question

How do I solve for a for the indicated variable​

Answer 1

16)

`a=-(3)/(4u)` .......as required

18)

`a=(u)/(4)`..........as required

Explanation:

16)

`u=-(3)/(4a) ,for\ a`

Multiply both the side by 'a' and divide both the side by 'u'

`(a)/(u)* u=-(3)/(4a)* (a)/(u)`

Cancel 'u'on Left side and 'a' on right side we get

`a=-(3)/(4u)` .......as required

18)

`u=4a`.......Given

Dividing by 4 on both the side we get

`(u)/(4) =(4a)/(4) \\`

Cancel 4 on right side we get

`a=(u)/(4)`..........as required