If we simply the expression 4(z/8)+(z/4) as (6z/A) what is the value of A?

It seems an easy question but I am confused as to why I am not getting the answer right.

Question

If we simply the expression 4(z/8)+(z/4) as (6z/A) what is the value of A?

It seems an easy question but I am confused as to why I am not getting the answer right.

amistre64 · Answer

show us your workings

amistre64 · Answer

4(z/8)+(z/4) = (6z/A)


              6z
A = -------------
        4z/8 + z/4


              6z
A = -------------
        z(4/8 + 1/4)


              6
A = -------------
        (4/8 + 1/4)