Get into J = (1 Viewer)

[bluboy22]

Q/p = s/p-j

 

[pqd123]

can u be more specific about wat u want? did u want to make j the subject? also is j part of the fraction?

 

[bluboy22]

can u be more specific about wat u want? did u want to make j the subject? also is j part of the fraction?

Yeah j as the subject and it is part of the fraction.

Q/p = s/(p-j)

j= ?

 

[pqd123]

cross multiply and u get
Qp - Qj = sp
Qj = Qp - sp
j = (Qp - sp)/Q

 

[bluboy22]

cross multiply and u get
Qp - Qj = sp
Qj = Qp - sp
j = (Qp - sp)/Q

Okay I have no idea what cross multiply is, is there another method you can answer it?

 

[pqd123]

cross multiply is where u get the bottom of each fraction and move it over to the top of the other fraction. if u still dont get it

multiply both sides by (p -j)
Q(p-j)/p =s
(Qp - Qj)/p = s

multiply both sides by p
Qp - Qj = sp

and u end up with wat i got before

 

[iMAN2]

Q/p = s/p-j

(Q/P)=S/(P-J)

P-J is dividing on the RHS. So if we take it to LHS then we must multiply it:
(Q/P) x (P-J)=S


(Q/P) is multiplying on the LHS. If we take it to the RHS we must divide it:
(P-J)=S/(Q/P)

P-J= (S/1) x (P/Q)

P-J= (S x P)/(Q x 1)

P-J= SP/Q

P is positive (adding) on the LHS. If we take it to the RHS we must make it negative (subtract):
-J= (SP/Q)-P

If we mulitply the LHS by -1 then we must do the same to the RHS:
-J x -1 = -1 x (SP/Q)-P

J= -[(SP/Q)-P]

J=-(SP/Q)+P

J=P-(SP/Q)

 

[cutemouse]

Q/p = s/p-j

Q/p = s/(p-j)

So p/Q = (p-j)/s

So p-j = ps/Q

So j = p- ps/Q