Question

help plse:
solve
z-4 / z+5 = 1/7
z=?

Answer 1

7z-28 = z+5
6z = 33
z = 11/2

Answer 2

could you show the steps plse

Answer 3

(z-4)/(z+5) = 1/7
cross multiply
7(z-4) = 1(z+5)
7z - 28 = z+5

Answer 4

how did you arrive at z=11/2

Answer 5

see what i did earlier
if 6z = 33
divide both sides by 3
2z = 11
z = 11/2

Answer 6

ok gotcha
can you show me the steps to this one plse:
add simplify if possible
3/rv^2 + 7/r^2v =

Answer 7

(3r+7v)/r^2v^2

Answer 8

can you show me the steps to this one plse:
add simplify if possible
3/rv^2 + 7/r^2v =